403
WWUS75 KPSR 182013
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
113 PM MST Mon Aug 18 2025

AZZ530>533-535-536-CAZ560>570-191200-
/O.UPG.KPSR.XH.A.0005.250820T1700Z-250823T0300Z/
/O.NEW.KPSR.XH.W.0007.250820T1700Z-250823T0300Z/
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 Palo Verde, Plaster City, Quartzsite,
Blythe, Parker, Ocotillo, Alamorio, Winona, Desert Shores,
Midland, Brenda, Ehrenberg, Yuma, Harcuvar, Coyote Wells, Salton
City, Martinez Lake, Vicksburg Junction, Salome, Vicksburg,
Chiriaco Summit, Ripley, Cottonwood Visitor, Brawley, El Centro,
Palm Canyon, Calexico, Ligurta, Fortuna Foothills, Lost
Horse-Keys Village, Coolidge Springs, Mountain Spring,
Winterhaven, and Imperial Hot Mineral Springs
113 PM MST Mon Aug 18 2025 /113 PM PDT Mon Aug 18 2025/

...EXTREME HEAT WARNING IN EFFECT FROM 10 AM MST /10 AM PDT/
WEDNESDAY TO 8 PM MST /8 PM PDT/ FRIDAY...

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to
  115 expected. 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.

&&

$$

AZZ534-538-539-541-545-547-549-552>556-559-560-562-191200-
/O.UPG.KPSR.XH.A.0005.250820T1700Z-250823T0300Z/
/O.NEW.KPSR.XH.W.0007.250820T1700Z-250823T0300Z/
Aguila Valley-Tonopah Desert-Gila Bend-Cave Creek/New River-New
River Mesa-Rio Verde/Salt River-Fountain Hills/East Mesa-Superior-
Northwest Pinal County-West Pinal County-Apache Junction/Gold
Canyon-Tonto Basin-Sonoran Desert Natl Monument-San Carlos-
Globe/Miami-
Including the cities of Aguila, Sentinel, Kaka, Miami,
Wintersburg, Superior, Peridot, Globe, Florence, Arlington, Gila
Bend, Gladden, Coolidge, Casa Grande, Tonopah, Cactus Forest,
Wickenburg, Tortilla Flat, Fountain Hills, Apache Junction,
Punkin Center, Scottsdale, Hassayampa, and San Carlos
113 PM MST Mon Aug 18 2025

...EXTREME HEAT WARNING IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM MST
FRIDAY...

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to
  114 expected. Major Heat Risk.

* WHERE...A portion of south central Arizona.

* WHEN...From 10 AM Wednesday 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.

&&

$$

AZZ537-540-542>544-546-548-550-551-191200-
/O.UPG.KPSR.XH.A.0005.250820T1700Z-250823T0300Z/
/O.NEW.KPSR.XH.W.0007.250820T1700Z-250823T0300Z/
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 Mesa, Phoenix, Chandler, Surprise, Tempe,
Avondale, Cashion, Liberty, Sun Lakes, Sun City West, Beardsley,
Queen Creek, Paradise Valley, Peoria, Gilbert, Goodyear,
Wittmann, and Circle City
113 PM MST Mon Aug 18 2025

...EXTREME HEAT WARNING IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM MST
FRIDAY...

* WHAT...Dangerously hot conditions. Afternoon temperatures 109 to
  114 expected. 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...From 10 AM Wednesday 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.

* 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.

&&

$$

INS