Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
1216 PM PDT Mon Jun 16 2025
AZZ002-003-036-CAZ522>524-527-NVZ017-020-021-170900-
/O.NEW.KVEF.XH.W.0004.250618T1700Z-250620T0500Z/
Lake Havasu and Fort Mohave-Northwest Deserts-Lake Mead National
Recreation Area-Death Valley National Park-Western Mojave Desert-
Eastern Mojave Desert-San Bernardino County-Upper Colorado River
Valley-Western Clark and Southern Nye County-Las Vegas Valley-
Lake Mead National Recreation Area-
Including the cities of North Las Vegas, Mountain Pass,
Henderson, Yucca, Needles, Amargosa Valley, Stovepipe Wells,
Topock, Mohave Valley, Wikieup, Baker, Dolan Springs, Lake Havasu
City, Barstow, Boulder City, Desert Rock, Furnace Creek, Pahrump,
Laughlin, Kingman, Hoover Dam, Desert Hills, Fort Irwin,
Shoshone, Bullhead City, Mitchell Caverns, Indian Springs,
Oatman, Valentine, Daggett, Las Vegas, and Golden Valley
1216 PM PDT Mon Jun 16 2025 /1216 PM MST Mon Jun 16 2025/
...EXTREME HEAT WARNING IN EFFECT FROM 10 AM PDT /10 AM MST/
WEDNESDAY TO 10 PM PDT /10 PM MST/ THURSDAY...
* WHAT...Dangerously hot conditions. Expect high temperatures around
110 in Las Vegas, Pahrump, and Barstow, around 105 in Kingman, 110
to 115 in the Colorado River Valley, and around 120 at Furnace
Creek in Death Valley National Park. Overnight lows in the 80s in
Las Vegas and at the lower elevations along the Colorado River
will give little relief from the heat.
* WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort
Mohave, Northwest Deserts, Death Valley National Park, Western
Mojave Desert, Eastern Mojave Desert, San Bernardino County-Upper
Colorado River Valley, Western Clark and Southern Nye County, and
Las Vegas Valley.
* WHEN...From 10 AM PDT /10 AM MST/ Wednesday to 10 PM PDT /10 PM
MST/ Thursday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of water, 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 late 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.
&&
$$
For more information from the National Weather Service visit
http://weather.gov/lasvegas
CM
URGENT - WEATHER MESSAGE
National Weather Service Flagstaff AZ
1233 AM MST Tue Jun 17 2025
AZZ006-171545-
/O.CON.KFGZ.XH.W.0001.000000T0000Z-250621T0200Z/
Grand Canyon Country-
Including the cities of Supai, North Rim, and Grand Canyon
Village
1233 AM MST Tue Jun 17 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM MST FRIDAY
BELOW 4000 FEET...
* WHAT...Dangerously hot conditions below 4000 feet, with daytime
temperatures ranging from 102 degrees at Havasupai Gardens, to 114
degrees at Phantom Ranch.
* WHERE...Lower elevations of the Grand Canyon.
* WHEN...Until 7 PM MST Friday.
* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This warning is reserved for only the hottest days of the year and
is issued when temperatures are expected to rise to dangerous levels.
Day hikers on Bright Angel Trail should descend no farther than 1
1/2 miles from the upper trailhead. Between the hours of 10 AM and 4
PM, hikers should be out of the canyon or at Havasupai Gardens or
Bright Angel campgrounds, physical activity is discouraged. All
hikers should have adequate gear, including a wide-brimmed hat,
sunscreen, salty snacks, sufficient water, and electrolyte mix.
Doubling your calorie intake helps maintain your energy.
Hike smart.
&&
$$
Konieczny
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
103 PM MST Mon Jun 16 2025
AZZ534-538-539-547-552>556-559>562-171200-
/O.NEW.KPSR.XH.W.0002.250618T1700Z-250621T0300Z/
/O.CON.KPSR.XH.W.0001.000000T0000Z-250617T0300Z/
Aguila Valley-Tonopah Desert-Gila Bend-Rio Verde/Salt River-
Superior-Northwest Pinal County-West Pinal County-Apache
Junction/Gold Canyon-Tonto Basin-Sonoran Desert Natl Monument-San
Carlos-Dripping Springs-Globe/Miami-
Including the cities of Wintersburg, Apache Junction, Punkin
Center, San Carlos, Globe, Florence, Tortilla Flat, Tonopah,
Aguila, Coolidge, Hassayampa, Gladden, Gila Bend, Sentinel,
Wickenburg, Arlington, Miami, Kaka, Casa Grande, Hayden,
Winkelman, Peridot, Cactus Forest, and Superior
103 PM MST Mon Jun 16 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
...EXTREME HEAT WARNING IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM MST
FRIDAY...
* WHAT...For the first Extreme Heat Warning, dangerously hot
conditions. Afternoon temperatures 108 to 114. Major Heat Risk.
Overexposure can cause heat cramps and heat exhaustion to develop
and, without intervention, can lead to heat stroke. For the second
Extreme Heat Warning, dangerously hot conditions. Afternoon
temperatures 106 to 116 expected. Major Heat Risk. Overexposure
can cause heat cramps and heat exhaustion to develop and, without
intervention, can lead to heat stroke.
* WHERE...A portion of south central Arizona.
* WHEN...For the first Extreme Heat Warning, until 8 PM MST this
evening. For the second Extreme Heat Warning, from 10 AM Wednesday
to 8 PM MST Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
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.
&&
$$
