Extreme Heat Watch
URGENT - WEATHER MESSAGE
National Weather Service Tucson AZ
143 AM MST Thu Jun 12 2025
AZZ501>509-122045-
/O.CON.KTWC.XH.A.0001.250614T1700Z-250617T0200Z/
Western Pima County-Tohono O`odham Nation-Upper Santa Cruz River
Valley/Altar Valley-Tucson Metro Area-South Central Pinal County-
Southeast Pinal County-Upper San Pedro River Valley-Eastern
Cochise County below 5000 feet-Upper Gila River Valley-
Including the cities of Vail, Ajo, Willcox, Clifton, Organ Pipe
Cactus N.M., Picacho Peak State Park, Sells, Nogales, Tucson,
Sierra Vista, Mammoth, Benson, Douglas, Green Valley, Marana,
Safford, and Oracle
143 AM MST Thu Jun 12 2025
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH MONDAY EVENING...
* WHAT...Dangerously hot conditions with temperatures up to 111
possible in the Tucson metropolitan area, Gila River Valley, and
across western and central Pima County including the Tohono
O`odham Nation. High temperatures elsewhere will be 100 to 105
degrees.
* WHERE...Eastern Cochise County below 5000 feet, South Central
Pinal County, Southeast Pinal County, Tohono O`odham Nation,
Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River
Valley, Upper Santa Cruz River Valley/Altar Valley, and Western
Pima County.
* WHEN...From Saturday morning through Monday 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 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.
&&
$$
GLZ
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
109 AM MST Thu Jun 12 2025
AZZ534-538-539-547-552>556-559>562-122230-
/O.CON.KPSR.XH.A.0001.250614T1700Z-250617T0300Z/
Aguila Valley-Tonopah Desert-Gila Bend-Rio Verde/Salt River-
Superior-Northwest Pinal County-West Pinal County-Apache
Junction/Gold Canyon-Tonto Basin-Sonoran Desert Natl Monument-San
Carlos-Dripping Springs-Globe/Miami-
Including the cities of Gladden, Tonopah, Cactus Forest, Miami,
Apache Junction, Wickenburg, Hayden, Globe, Arlington, Peridot,
Coolidge, Aguila, Superior, Winkelman, San Carlos, Sentinel,
Punkin Center, Gila Bend, Casa Grande, Hassayampa, Wintersburg,
Tortilla Flat, Florence, and Kaka
109 AM MST Thu Jun 12 2025
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH MONDAY EVENING...
* WHAT...Dangerously hot conditions possible. Afternoon temperatures
104 to 114. Major Heat Risk. Overexposure can cause heat cramps
and heat exhaustion to develop and, without intervention, can lead
to heat stroke.
* WHERE...A portion of south central Arizona.
* WHEN...From Saturday morning through Monday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Watch means that a period of very hot temperatures,
even by local standards, may occur. Actions should be taken to
lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible
and drink plenty of water.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
109 AM MST Thu Jun 12 2025
AZZ537-540>544-546-548>551-122230-
/O.CON.KPSR.XH.A.0001.250614T1700Z-250617T0300Z/
Northwest Valley-Buckeye/Avondale-Cave Creek/New River-Deer
Valley-Central Phoenix-North Phoenix/Glendale-Scottsdale/Paradise
Valley-East Valley-Fountain Hills/East Mesa-South
Mountain/Ahwatukee-Southeast Valley/Queen Creek-
Including the cities of Mesa, Tempe, Liberty, Gilbert, Phoenix,
Chandler, Beardsley, Peoria, Surprise, Sun Lakes, Sun City West,
Goodyear, Cashion, Wittmann, Circle City, Fountain Hills,
Avondale, Scottsdale, Paradise Valley, and Queen Creek
109 AM MST Thu Jun 12 2025
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH MONDAY EVENING...
* WHAT...Dangerously hot conditions possible. Afternoon temperatures
106 to 114. 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, including the Phoenix
Metro.
* WHEN...From Saturday morning through Monday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...In Maricopa County, call 2 1 1 to find a free
cooling center, transportation, water, and more.
https://www.maricopa.gov/heat
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Watch means that a period of very hot temperatures,
even by local standards, may 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 Phoenix AZ
109 AM MST Thu Jun 12 2025
AZZ530>533-535-536-CAZ562>567-569-570-122230-
/O.CON.KPSR.XH.A.0001.250614T1700Z-250617T0300Z/
Parker Valley-Kofa-Yuma-Central La Paz-Southeast Yuma County-Gila
River Valley-Imperial County Southwest-Salton Sea-Chuckwalla
Mountains-Imperial County Southeast-Imperial County West-Imperial
Valley-Palo Verde Valley-Chuckwalla Valley-
Including the cities of Brenda, Winona, Mountain Spring, Coolidge
Springs, Fortuna Foothills, Harcuvar, Palo Verde, Parker, Blythe,
Ripley, Martinez Lake, Ehrenberg, Brawley, Imperial Hot Mineral
Springs, Coyote Wells, Ligurta, Salton City, Palm Canyon, Plaster
City, Winterhaven, Calexico, Midland, Ocotillo, Quartzsite,
Vicksburg, Desert Shores, El Centro, Salome, Alamorio, Yuma, and
Vicksburg Junction
109 AM MST Thu Jun 12 2025 /109 AM PDT Thu Jun 12 2025/
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH MONDAY EVENING...
* WHAT...Dangerously hot conditions possible. Afternoon temperatures
104 to 114. Major Heat Risk. Overexposure can cause heat cramps
and heat exhaustion to develop and, without intervention, can lead
to heat stroke.
* WHERE...Portions of southwest Arizona and southeast California.
* WHEN...From Saturday morning through Monday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Watch means that a period of very hot temperatures,
even by local standards, may 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Flagstaff AZ
807 PM MST Wed Jun 11 2025
AZZ006-121115-
/O.CON.KFGZ.XH.A.0001.250614T1700Z-250616T0200Z/
Grand Canyon Country-
Including the cities of Grand Canyon Village, North Rim, and
Supai
807 PM MST Wed Jun 11 2025
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SUNDAY EVENING BELOW 4000 FEET...
* WHAT...Dangerously hot conditions possible below 4000 feet, with
daytime temperatures ranging from 103 degrees at Havasupai
Gardens, to 110 degrees at Phantom Ranch.
* WHERE...Lower Elevations of the Grand Canyon.
* WHEN...From Saturday morning through Sunday evening.
* 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 watch is reserved for only the hottest days of the year and is
issued when temperatures could 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.
&&
$$
RR
