Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
115 AM MST Sun Aug 3 2025
AZZ547-032300-
/O.CON.KPSR.XH.W.0006.250805T1700Z-250809T0300Z/
Rio Verde/Salt River-
Including the cities of Tortilla Flat
115 AM MST Sun Aug 3 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM
MST FRIDAY...
* WHAT...Dangerously hot conditions possible. Afternoon temperatures
106 to 117. Major Heat Risk.
* WHERE...Rio Verde/Salt River.
* WHEN...From 10 AM Tuesday to 8 PM MST Friday.
* 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
115 AM MST Sun Aug 3 2025
AZZ534-538-539-541-549-552>555-559-032300-
/O.CON.KPSR.XH.W.0005.000000T0000Z-250809T0300Z/
Aguila Valley-Tonopah Desert-Gila Bend-Cave Creek/New River-
Fountain Hills/East Mesa-Superior-Northwest Pinal County-West
Pinal County-Apache Junction/Gold Canyon-Sonoran Desert Natl
Monument-
Including the cities of Arlington, Aguila, Sentinel, Fountain
Hills, Cactus Forest, Apache Junction, Coolidge, Wickenburg,
Wintersburg, Gila Bend, Casa Grande, Tonopah, Hassayampa,
Gladden, Scottsdale, Florence, Superior, and Kaka
115 AM MST Sun Aug 3 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST FRIDAY...
* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to
117. Major Heat Risk.
* WHERE...Sonoran Desert National Monument, Aguila Valley, Tonopah
Desert, Gila Bend, Cave Creek/New River, Fountain Hills/East Mesa,
Superior, Northwest Pinal County, West Pinal County, and Apache
Junction/Gold Canyon.
* WHEN...Until 8 PM MST Friday.
* 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
115 AM MST Sun Aug 3 2025
AZZ537-540-542>544-546-548-550-551-032300-
/O.CON.KPSR.XH.W.0005.000000T0000Z-250809T0300Z/
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 Circle City, Wittmann, Liberty,
Beardsley, Avondale, Tempe, Surprise, Chandler, Cashion, Mesa,
Peoria, Phoenix, Gilbert, Paradise Valley, Goodyear, Queen Creek,
Sun City West, and Sun Lakes
115 AM MST Sun Aug 3 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST FRIDAY...
* WHAT...Dangerously hot conditions. Afternoon temperatures 108 to
118. Extreme 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 Friday.
* 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
115 AM MST Sun Aug 3 2025
AZZ545-556>558-560>563-032300-
/O.CON.KPSR.XH.W.0006.250805T1700Z-250809T0300Z/
New River Mesa-Tonto Basin-Mazatzal Mountains-Pinal/Superstition
Mountains-San Carlos-Dripping Springs-Globe/Miami-Southeast Gila
County-
Including the cities of Peridot, Globe, Hayden, Winkelman, Miami,
Punkin Center, Sunflower, and San Carlos
115 AM MST Sun Aug 3 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM
MST FRIDAY...
* WHAT...Dangerously hot conditions possible. Afternoon temperatures
97 to 113. Extreme Heat Risk.
* WHERE...Dripping Springs, Globe/Miami, Mazatzal Mountains, New
River Mesa, Pinal/Superstition Mountains, San Carlos, Southeast
Gila County, and Tonto Basin.
* WHEN...From 10 AM Tuesday to 8 PM MST Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Overexposure can cause heat cramps and heat
exhaustion to develop and, without intervention, can lead to heat
stroke.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Warning means that a period of very hot
temperatures, even by local standards, will occur. Actions should be
taken to lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible
and drink plenty of water.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
Public cooling shelters are available in some areas. Consult county
officials for more details.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
115 AM MST Sun Aug 3 2025
AZZ530>533-535-536-CAZ560>570-032300-
/O.CON.KPSR.XH.W.0006.250806T1700Z-250809T0300Z/
Parker Valley-Kofa-Yuma-Central La Paz-Southeast Yuma County-Gila
River Valley-Joshua Tree NP West-Joshua Tree NP East-Imperial
County Southwest-Salton Sea-Chuckwalla Mountains-Imperial County
Southeast-Imperial County West-Imperial Valley-Chiriaco Summit-
Palo Verde Valley-Chuckwalla Valley-
Including the cities of Fortuna Foothills, Ocotillo, Plaster
City, Mountain Spring, Winterhaven, Martinez Lake, Salome,
Ripley, Vicksburg Junction, Harcuvar, Alamorio, Calexico, El
Centro, Ehrenberg, Parker, Ligurta, Salton City, Coyote Wells,
Palo Verde, Lost Horse-Keys Village, Brenda, Midland, Imperial
Hot Mineral Springs, Cottonwood Visitor, Chiriaco Summit, Desert
Shores, Yuma, Coolidge Springs, Quartzsite, Brawley, Vicksburg,
Winona, Blythe, and Palm Canyon
115 AM MST Sun Aug 3 2025 /115 AM PDT Sun Aug 3 2025/
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM MST /10 AM PDT/
WEDNESDAY TO 8 PM MST /8 PM PDT/ FRIDAY...
* WHAT...Dangerously hot conditions possible. Afternoon temperatures
108 to 118. Major Heat Risk.
* WHERE...Portions of southwest Arizona and southeast and southern
California.
* WHEN...From 10 AM MST /10 AM PDT/ Wednesday to 8 PM MST /8 PM PDT/
Friday.
* 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.
&&
$$
INS
URGENT - WEATHER MESSAGE
National Weather Service Tucson AZ
121 AM MST Sun Aug 3 2025
AZZ501>507-509-515-032300-
/O.CAN.KTWC.XH.A.0005.250806T1700Z-250809T0300Z/
/O.EXT.KTWC.XH.W.0005.000000T0000Z-250809T0300Z/
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-Upper Gila
River Valley-Baboquivari Mountains-
Including the cities of Oracle, Organ Pipe Cactus N.M., Green
Valley, Safford, Picacho Peak State Park, Ajo, Mammoth, Nogales,
Benson, Marana, Tucson, Sierra Vista, Kitt Peak, Clifton, Vail,
and Sells
121 AM MST Sun Aug 3 2025
...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM MST FRIDAY...
* WHAT...Dangerously hot conditions with temperatures up to 116
Wednesday and Thursday across portions of Pima County and
south-central Pinal County. Otherwise temperatures will typically
range from 103 to 111.
* WHERE...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...Until 8 PM MST Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
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.
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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Tucson AZ
121 AM MST Sun Aug 3 2025
AZZ508-032300-
/O.UPG.KTWC.XH.A.0005.250806T1700Z-250809T0300Z/
/O.EXB.KTWC.XH.W.0005.250805T1700Z-250809T0300Z/
Eastern Cochise County below 5000 feet-
Including the cities of Willcox and Douglas
121 AM MST Sun Aug 3 2025
...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM MST
FRIDAY...
* WHAT...Dangerously hot conditions with temperatures of 101 to 105
Tuesday.
* WHERE...Eastern Cochise County below 5000 feet.
* WHEN...From 10 AM Tuesday to 8 PM MST Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
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.
&&
$$
GEL
URGENT - WEATHER MESSAGE
National Weather Service Flagstaff AZ
1148 AM MST Sat Aug 2 2025
AZZ006-040000-
/O.CON.KFGZ.XH.W.0004.000000T0000Z-250806T0200Z/
Grand Canyon Country-
Including the cities of North Rim, Supai, and Grand Canyon
Village
1148 AM MST Sat Aug 2 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM MST TUESDAY
BELOW 4000 FEET...
* WHAT...Dangerously hot conditions below 4000 feet, with daytime
temperatures ranging from 103 degrees at Havasupai Gardens, to 113
degrees at Phantom Ranch.
* WHERE...Lower elevations of the Grand Canyon.
* WHEN...Until 7 PM MST Tuesday.
* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This warning is reserved for only the hottest days of the year and
is issued when temperatures are expected to rise to dangerous levels.
Day hikers on Bright Angel Trail should descend no farther than 1
1/2 miles from the upper trailhead. Between the hours of 10 AM and 4
PM, hikers should be out of the canyon or at Havasupai Gardens or
Bright Angel campgrounds, physical activity is discouraged. All
hikers should have adequate gear, including a wide-brimmed hat,
sunscreen, salty snacks, sufficient water, and electrolyte mix.
Doubling your calorie intake helps maintain your energy.
Hike smart.
Take action when you see symptoms of heat exhaustion and heat
stroke. Anyone overcome by heat should be moved to a cool and shaded
location. Heat stroke is an emergency! Call 9 1 1.
Stay cool, stay hydrated, stay informed.
&&
$$
Humphreys
