Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
351 AM PDT Tue Aug 12 2025
CAZ381>383-130400-
/O.CON.KLOX.XH.W.0001.000000T0000Z-250813T0400Z/
Western Antelope Valley Foothills-Eastern Antelope Valley
Foothills-Antelope Valley-
Including the cities of Pearblossom, Palmdale, Lake Palmdale,
Llano, Lake Los Angeles, Elizabeth Lake, Lancaster, and Valyermo
351 AM PDT Tue Aug 12 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING...
* WHAT...Dangerously hot conditions with temperatures up to 109
expected. Also, overnight temperatures will remain in the 80s in
the foothills above 3000 feet elevation.
* WHERE...Antelope Valley, Eastern Antelope Valley Foothills, and
Western Antelope Valley Foothills.
* WHEN...Until 9 PM PDT this evening.
* IMPACTS...There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
Anyone overcome by heat should be moved to a cool and shaded
location. Heat stroke is an emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Spokane WA
255 AM PDT Tue Aug 12 2025
IDZ026-WAZ032-130300-
/O.UPG.KOTX.HT.Y.0005.000000T0000Z-250813T0300Z/
/O.NEW.KOTX.XH.W.0002.250812T0955Z-250813T0300Z/
Lewiston Area-Lower Garfield and Asotin Counties-
Including the cities of Alpowa Summit, Clarkston, Pomeroy,
Lapwai, Gifford, Lewiston, Culdesac, Peck, and Lewiston Grade
255 AM PDT Tue Aug 12 2025
...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT THIS EVENING...
* WHAT...Hot temperatures. High temperatures 96 to 103 degrees.
Limited overnight relief with low temperatures 66 to 72.
* WHERE...Alpowa Summit, Clarkston, Pomeroy, Lapwai, Gifford,
Lewiston, Culdesac, Peck, and Lewiston Grade.
* WHEN...Until 8 PM PDT this evening.
* IMPACTS...Hot temperatures will increase the risk of heat-related
illnesses. Heat of this magnitude affects anyone without cooling
and hydration as well as health systems and industries.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Spokane WA
255 AM PDT Tue Aug 12 2025
WAZ034-041-130300-
/O.UPG.KOTX.HT.Y.0005.000000T0000Z-250813T0300Z/
/O.NEW.KOTX.XH.W.0002.250812T0955Z-250813T0300Z/
Moses Lake Area-Wenatchee Area-
Including the cities of Number 1 Canyon, Ephrata, Quincy,
Wenatchee, Pangborn Airport, Entiat, Number 2 Canyon, Chelan,
Cashmere, Moses Lake, and Othello
255 AM PDT Tue Aug 12 2025
...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT THIS EVENING...
* WHAT...Hot temperatures. High temperatures 98 to 103 degrees.
Limited overnight relief with low temperatures 67 to 75.
* WHERE...Ephrata, Quincy, Wenatchee, Pangborn Airport, Entiat,
Chelan, Cashmere, Moses Lake, and Othello.
* WHEN...Until 8 PM PDT this evening.
* IMPACTS...Hot temperatures will increase the risk of heat-related
illnesses. Heat of this magnitude affects anyone without cooling
and hydration as well as health systems and industries.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
203 AM PDT Tue Aug 12 2025
CAZ060-122230-
/O.EXB.KSGX.XH.W.0002.250812T1800Z-250813T0300Z/
Apple and Lucerne Valleys-
Including the cities of Lucerne Valley, Apple Valley,
Victorville, and Hesperia
203 AM PDT Tue Aug 12 2025
...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM
PDT THIS EVENING...
* WHAT...Dangerously hot conditions with temperatures up to 105
expected.
* WHERE...Apple and Lucerne Valleys.
* WHEN...From 11 AM this morning to 8 PM PDT this evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
203 AM PDT Tue Aug 12 2025
CAZ061-062-122230-
/O.CON.KSGX.XH.W.0002.000000T0000Z-250814T0300Z/
Coachella Valley-San Diego County Deserts-
Including the cities of Palm Desert, Palm Springs, Cathedral
City, Coachella, Indio, Borrego Springs, La Quinta, and Palm
Desert Country
203 AM PDT Tue Aug 12 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY...
* WHAT...Dangerously hot conditions with temperatures up to 112.
* WHERE...Coachella Valley and San Diego County Deserts.
* WHEN...Until 8 PM PDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
203 AM PDT Tue Aug 12 2025
CAZ065-122230-
/O.CON.KSGX.XH.W.0002.000000T0000Z-250814T0300Z/
San Gorgonio Pass near Banning-
203 AM PDT Tue Aug 12 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY...
* WHAT...Dangerously hot conditions with temperatures up to 109.
* WHERE...San Gorgonio Pass near Banning.
* WHEN...Until 8 PM PDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
17
URGENT - WEATHER MESSAGE
National Weather Service Portland OR
142 AM PDT Tue Aug 12 2025
ORZ109>125-WAZ205>207-209-210-130100-
/O.CON.KPQR.XH.W.0001.000000T0000Z-250813T0500Z/
Tualatin Valley-Portland West Hills and Chehalem Mountain-Inner
Portland Metro-East Portland Metro-Outer Southeast Portland Metro-
West Central Willamette Valley-East Central Willamette Valley-
Benton County Lowlands-Linn County Lowlands-Lane County Lowlands-
West Columbia River Gorge of Oregon above 500 ft-West Columbia
River Gorge I-84 Corridor-Upper Hood River Valley-Central
Columbia River Gorge I-84 Corridor-Clackamas County Cascade
Foothills-Cascade Foothills of Marion and Linn Counties-Lane
County Cascade Foothills-North Clark County Lowlands-Inner
Vancouver Metro-East Clark County Lowlands-West Columbia River
Gorge SR 14 Corridor-Central Columbia River Gorge SR 14 Corridor-
Including the cities of Chehalem Mountain, Corvallis, Brightwood,
Sandy, Sellwood, Sherwood, Underwood, Rockcreek, Hillsboro, North
Bonneville, Sylvan Hill, Oakridge, Portland, Evergreen, Sheridan,
Vida, Newberg, Multnomah Falls, La Center, Vancouver, Odell,
Wyeth, Stayton, Eugene, Hood River, Skyline Drive, Silver Falls,
Washougal, Silverton, Camas, Brownsville, Hockinson, Springfield,
Gresham, Troutdale, Carson, Boring, Ridgefield, Detroit,
Stevenson, Bonneville, Corbett, Lebanon, Estacada, Keizer,
McKenzie Bridge, Salem, Monmouth, Cape Horn, Rhododendron,
Molalla, Cottage Grove, Happy Valley, Lake Oswego, McMinnville,
Rooster Rock, Battle Ground, Albany, Oregon City, Dallas,
Fairview, Wilsonville, Welches, Beacon Rock SP, Brush Prairie,
Junction City, Mill City, Forest Grove, Cascade Locks,
Cherryville, Creswell, Parkdale, Philomath, Salmon Creek,
Harrisburg, Tigard, Woodburn, Eagle Creek, and Monroe
142 AM PDT Tue Aug 12 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS
EVENING...
* WHAT...Dangerously hot conditions with temperatures of 97 to 102
degrees. Tuesday morning temperatures of 68 to 73 degrees from
Salem northward, and 60 to 63 degrees south of Salem.
* WHERE...Greater Portland/Vancouver Metro, Western and Central
Columbia River Gorge, the Corbett area and the Hood River Valley,
Central and Southern Willamette Valley, and Foothills of the
Northern and Central Oregon Cascades.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Overnight conditions will begin to cool on
Tuesday night into Wednesday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in a cool place during the heat of the
day, stay out of the sunshine, and check up on relatives and
neighbors. For those without air conditioning, use fans to keep air
moving. Keeps windows closed during the day and open at night,
unless air quality is degraded due to wildfire smoke.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Monitor the latest forecasts and warnings for updates.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
122 AM PDT Tue Aug 12 2025
AZZ002-003-CAZ522-523-525>527-NVZ017-121700-
/O.CON.KVEF.XH.W.0008.000000T0000Z-250813T0300Z/
Lake Havasu and Fort Mohave-Northwest Deserts-Death Valley
National Park-Western Mojave Desert-Morongo Basin-Cadiz Basin-San
Bernardino County-Upper Colorado River Valley-Western Clark and
Southern Nye County-
Including the cities of Dolan Springs, Yucca, Amargosa Valley,
Shoshone, Barstow, Stovepipe Wells, Furnace Creek, Needles,
Golden Valley, Morongo Valley, Wikieup, Topock, Pahrump, Yucca
Valley, Daggett, Lake Havasu City, Indian Springs, Vidal
Junction, Fort Irwin, Kingman, Desert Rock, Twentynine Palms,
Valentine, and Desert Hills
122 AM PDT Tue Aug 12 2025 /122 AM MST Tue Aug 12 2025/
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT / MST THIS
EVENING...
* WHAT...Dangerously hot conditions with high temperatures between
103 and 106 in Kingman, Golden Valley, and Dolan Springs; between
108 and 112 in Barstow-Daggett, Twentynine Palms, and Yucca
Valley; between 112 and 116 in Lake Havasu City, Needles, and Fort
Mohave; between 118 and 122 at Furnace Creek in Death Valley
National Park. Major Heat Risk expected with heat-related impacts
possible to much of the population is precautions are not taken.
* WHERE...In Arizona, Lake Havasu and Fort Mohave and Northwest
Deserts. In California, Cadiz Basin, Death Valley National Park,
Morongo Basin, San Bernardino County-Upper Colorado River Valley,
and Western Mojave Desert. In Nevada, Western Clark and Southern
Nye County.
* WHEN...Until 8 PM PDT / MST this evening.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and
loose-fitting clothing. Try to limit strenuous activities to early
morning or evening. Take action when you see symptoms of heat
exhaustion and heat stroke.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air-conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
Monitor the latest forecasts and warnings for updates.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
122 AM PDT Tue Aug 12 2025
AZZ036-CAZ524-NVZ016-020>022-121700-
/O.CON.KVEF.XH.W.0008.250812T1700Z-250813T0300Z/
Lake Mead National Recreation Area-Eastern Mojave Desert-
Northeast Clark County-Las Vegas Valley-Lake Mead National
Recreation Area-Southern Clark County-
Including the cities of Mohave Valley, Boulder City, Baker,
Mountain Pass, Moapa, Hoover Dam, Mitchell Caverns, Searchlight,
Cal-Nev-Ari, Bullhead City, Las Vegas, Laughlin, North Las Vegas,
Henderson, Mesquite, Overton, Primm, and Oatman
122 AM PDT Tue Aug 12 2025 /122 AM MST Tue Aug 12 2025/
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM PDT / MST THIS
MORNING TO 8 PM PDT / MST THIS EVENING...
* WHAT...Dangerously hot conditions with high temperatures between
108 and 114 in Las Vegas, Lake Mead National Recreation Area,
Mesquite, Pahrump, and Baker.Major Heat Risk expected with
heat-related impacts possible to much of the population is
precautions are not taken.
* WHERE...Lake Mead National Recreation Area, Eastern Mojave Desert,
Northeast Clark County, Las Vegas Valley, and Southern Clark
County.
* WHEN...From 10 AM PDT / MST this morning to 8 PM PDT / MST this
evening.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and
loose-fitting clothing. Try to limit strenuous activities to early
morning or evening. Take action when you see symptoms of heat
exhaustion and heat stroke.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air-conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
Monitor the latest forecasts and warnings for updates.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Flagstaff AZ
1215 AM MST Tue Aug 12 2025
AZZ006-131200-
/O.CON.KFGZ.XH.W.0004.000000T0000Z-250815T0300Z/
Grand Canyon Country-
Including the cities of Grand Canyon Village, Supai, and North
Rim
1215 AM MST Tue Aug 12 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THURSDAY
BELOW 4000 FEET...
* WHAT...Dangerously hot conditions below 4000 feet, with daytime
temperatures ranging from 102 degrees at Havasupai Gardens, to 111
degrees at Phantom Ranch.
* WHERE...Lower elevations of the Grand Canyon.
* WHEN...Until 8 PM MST Thursday.
* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This warning is reserved for only the hottest days of the year and
is issued when temperatures are expected to rise to dangerous levels.
Day hikers on Bright Angel Trail should descend no farther than 1
1/2 miles from the upper trailhead. Between the hours of 10 AM and 4
PM, hikers should be out of the canyon or at Havasupai Gardens or
Bright Angel campgrounds, physical activity is discouraged. All
hikers should have adequate gear, including a wide-brimmed hat,
sunscreen, salty snacks, sufficient water, and electrolyte mix.
Doubling your calorie intake helps maintain your energy.
Hike smart.
Take action when you see symptoms of heat exhaustion and heat
stroke. Anyone overcome by heat should be moved to a cool and shaded
location. Heat stroke is an emergency! Call 9 1 1.
Stay cool, stay hydrated, stay informed.
&&
$$
Humphreys
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1213 AM MST Tue Aug 12 2025
AZZ534-538-539-541-549-553>555-559-122230-
/O.EXT.KPSR.XH.W.0005.000000T0000Z-250814T0300Z/
Aguila Valley-Tonopah Desert-Gila Bend-Cave Creek/New River-
Fountain Hills/East Mesa-Northwest Pinal County-West Pinal County-
Apache Junction/Gold Canyon-Sonoran Desert Natl Monument-
Including the cities of Cactus Forest, Aguila, Gladden, Florence,
Tonopah, Hassayampa, Sentinel, Kaka, Fountain Hills, Casa Grande,
Scottsdale, Coolidge, Wickenburg, Gila Bend, Wintersburg,
Arlington, and Apache Junction
1213 AM MST Tue Aug 12 2025
...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST WEDNESDAY...
* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to
113. Major Heat Risk.
* WHERE...Sonoran Desert National Monument, Aguila Valley, Tonopah
Desert, Gila Bend, Cave Creek/New River, Fountain Hills/East Mesa,
Northwest Pinal County, West Pinal County, and Apache
Junction/Gold Canyon.
* WHEN...Until 8 PM MST Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Overexposure can cause heat cramps and heat
exhaustion to develop and, without intervention, can lead to heat
stroke.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Warning means that a period of very hot
temperatures, even by local standards, will occur. Actions should be
taken to lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible
and drink plenty of water.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
Public cooling shelters are available in some areas. Consult county
officials for more details.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1213 AM MST Tue Aug 12 2025
AZZ530-532-CAZ562-563-566-567-569-570-122230-
/O.EXT.KPSR.XH.W.0006.000000T0000Z-250814T0300Z/
Parker Valley-Yuma-Imperial County Southwest-Salton Sea-Imperial
County West-Imperial Valley-Palo Verde Valley-Chuckwalla Valley-
Including the cities of Fortuna Foothills, Coolidge Springs,
Parker, Desert Shores, Winona, Calexico, Blythe, Brawley,
Ocotillo, Ehrenberg, Mountain Spring, Coyote Wells, Ripley,
Salton City, El Centro, Alamorio, Palo Verde, Plaster City,
Midland, Martinez Lake, and Yuma
1213 AM MST Tue Aug 12 2025 /1213 AM PDT Tue Aug 12 2025/
...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST /8 PM PDT/
WEDNESDAY...
* WHAT...Dangerously hot conditions. Afternoon temperatures 110 to
116. Major Heat Risk.
* WHERE...Southwest corner of Imperial County, Western Imperial
County, Parker Valley, Yuma, Salton Sea, Imperial Valley, Palo
Verde Valley, and Chuckwalla Valley.
* WHEN...Until 8 PM MST /8 PM PDT/ Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Overexposure can cause heat cramps and heat
exhaustion to develop and, without intervention, can lead to heat
stroke.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Warning means that a period of very hot
temperatures, even by local standards, will occur. Actions should be
taken to lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible
and drink plenty of water.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
Public cooling shelters are available in some areas. Consult county
officials for more details.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1213 AM MST Tue Aug 12 2025
AZZ537-540-542>544-546-548-550-551-122230-
/O.EXT.KPSR.XH.W.0005.000000T0000Z-250814T0300Z/
Northwest Valley-Buckeye/Avondale-Deer Valley-Central Phoenix-
North Phoenix/Glendale-Scottsdale/Paradise Valley-East Valley-
South Mountain/Ahwatukee-Southeast Valley/Queen Creek-
Including the cities of Wittmann, Beardsley, Surprise, Sun Lakes,
Mesa, Gilbert, Peoria, Cashion, Liberty, Circle City, Avondale,
Phoenix, Paradise Valley, Chandler, Tempe, Queen Creek, Goodyear,
and Sun City West
1213 AM MST Tue Aug 12 2025
...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST WEDNESDAY...
* WHAT...Dangerously hot conditions. Afternoon temperatures 108 to
112. Major Heat Risk.
* WHERE...The Northwest Valley of the Phoenix Metro Area, The East
Valley of the Phoenix Metro Area, Buckeye/Avondale, Deer Valley,
Central Phoenix, North Phoenix/Glendale, Scottsdale/Paradise
Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek.
* WHEN...Until 8 PM MST Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Overexposure can cause heat cramps and heat
exhaustion to develop and, without intervention, can lead to heat
stroke.
* ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free
cooling center, transportation, water, and more.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Warning means that a period of very hot
temperatures, even by local standards, will occur. Actions should be
taken to lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible
and drink plenty of water.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
Public cooling shelters are available in some areas. Consult county
officials for more details.
&&
$$
CK
URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
1035 PM PDT Mon Aug 11 2025
CAZ337>339-121500-
/O.CON.KHNX.XH.W.0001.000000T0000Z-250813T1500Z/
Indian Wells Valley-Mojave Desert Slopes-Mojave Desert-
Including the cities of Edwards AFB, Mojave, California City,
Ridgecrest, Randsburg, Rosamond, and Inyokern
1035 PM PDT Mon Aug 11 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 AM PDT WEDNESDAY...
* WHAT...Dangerously hot conditions with high temperatures up to 111
expected. Overnight lows as warm as the lower 80s.
* WHERE...Indian Wells Valley, Mojave Desert, and Mojave Desert
Slopes.
* WHEN...Until 8 AM PDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
&&
$$
BSO
URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
152 PM PDT Mon Aug 11 2025
ORZ505-508-510-511-WAZ521-130500-
/O.CON.KPDT.XH.W.0001.000000T0000Z-250813T0500Z/
John Day Basin-Foothills of the Southern Blue Mountains of Oregon-
North Central Oregon-Central Oregon-Simcoe Highlands-
Including the cities of Bickleton, Madras, Redmond, Dayville,
Goldendale, John Day, Mitchell, Dufur, Prineville, Spray, Condon,
Fossil, Maupin, Monument, Moro, Bend, and Heppner
152 PM PDT Mon Aug 11 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT TUESDAY...
* WHAT...Dangerously hot conditions with temperatures 99 to 102
degrees expected. This will pose a moderate to locally major risk
of heat-related illness.
* WHERE...In Oregon, Central Oregon, John Day Basin, Foothills of
the Southern Blue Mountains of Oregon, and North Central Oregon.
In Washington, Simcoe Highlands.
* WHEN...Until 10 PM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors. Young children and
pets should never be left unattended in vehicles under any
circumstances.
Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when possible.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
For sheltering information and other human services in your area,
dial 2 1 1 during business hours or visit 211info.org for Oregon or
wa211.org for Washington anytime.
&&
$$
MC
URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
152 PM PDT Mon Aug 11 2025
ORZ041-044-507-WAZ024-026>029-130500-
/O.CON.KPDT.XH.W.0001.000000T0000Z-250813T0500Z/
Eastern Columbia River Gorge of Oregon-Lower Columbia Basin of
Oregon-Foothills of the Northern Blue Mountains of Oregon-Eastern
Columbia River Gorge of Washington-Kittitas Valley-Yakima Valley-
Lower Columbia Basin of Washington-Foothills of the Blue
Mountains of Washington-
Including the cities of Arlington, Toppenish, Sunnyside,
Waitsburg, Athena, Pilot Rock, Naches, Ione, Dayton, The Dalles,
Thorp, Ellensburg, Pendleton, Walla Walla, Yakima, Connell,
Boardman, Prosser, White Salmon, Tri-Cities, and Hermiston
152 PM PDT Mon Aug 11 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT TUESDAY...
* WHAT...Dangerously hot conditions with temperatures 100 to 103
degrees expected. This will pose a moderate to major risk of
heat-related illness.
* WHERE...Eastern Columbia River Gorge of Oregon and Washington,
Lower Columbia Basin of Oregon and Washington, Foothills of the
Northern Blue Mountains of Oregon, Kittitas Valley, Yakima Valley,
and Foothills of the Blue Mountains of Washington.
* WHEN...Until 10 PM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Extreme heat will significantly increase the
risk of heat-related illnesses for much of the population,
especially those who are heat sensitive and those without
effective cooling or adequate hydration.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors. Young children and
pets should never be left unattended in vehicles under any
circumstances.
Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when possible.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
For sheltering information and other human services in your area,
dial 2 1 1 during business hours or visit 211info.org for Oregon or
wa211.org for Washington anytime.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Medford OR
1156 AM PDT Mon Aug 11 2025
CAZ080-081-121200-
/O.CON.KMFR.XH.W.0002.000000T0000Z-250813T0900Z/
Western Siskiyou County-Central Siskiyou County-
Including the cities of Happy Camp, Etna, Scott Bar, Fort Jones,
Somes Bar, Yreka, Callahan, Greenview, Hilt, and Klamath River
1156 AM PDT Mon Aug 11 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 2 AM PDT WEDNESDAY...
* WHAT...Dangerously hot temperatures of 100 to 110 degrees with
very warm overnight temperatures of 65 to 70 degrees.
* WHERE...The Shasta, Scott and Klamath River Valleys in central and
western Siskiyou County. This includes the communities of Weed,
Yreka, Montague, Etna, Ft Jones, Happy Camp and Somes Bar.
* WHEN...Until 2 AM PDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat. Warm overnight temperatures will provide little
relief from hot daytime temperatures.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay cool, stay hydrated, stay informed.
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Medford OR
1156 AM PDT Mon Aug 11 2025
ORZ024-026-121200-
/O.CON.KMFR.XH.W.0002.000000T0000Z-250813T0900Z/
Eastern Curry County and Josephine County-Jackson County-
Including the cities of Merlin, Grants Pass, Wilderville,
Medford, and Ashland
1156 AM PDT Mon Aug 11 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 2 AM PDT WEDNESDAY...
* WHAT...Dangerously hot temperatures of 100 to near 110 degrees
with very warm overnight temperatures of 65 to 70 degrees.
* WHERE...Portions of eastern Curry County, Josephine and Jackson
Counties. This includes the communities of Agness, Grants Pass,
Cave Junction, Williams, Ruch, Rogue River, Gold Hill, White City,
Shady Cove, Medford, Jacksonville, Talent and Ashland.
* WHEN...Until 2 AM PDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat. Warm overnight temperatures will provide little
relief from hot daytime temperatures.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay cool, stay hydrated, stay informed.
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
&&
$$
