816
WWUS75 KPSR 180815
NPWPSR

URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
115 AM MST Mon Aug 18 2025

AZZ530>533-535-536-CAZ560>570-182100-
/O.CON.KPSR.XH.A.0005.250820T1700Z-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 Winterhaven, Ripley, Chiriaco Summit,
Palm Canyon, Ligurta, Lost Horse-Keys Village, Yuma, Calexico,
Parker, Cottonwood Visitor, Ocotillo, Palo Verde, Brawley,
Blythe, Harcuvar, Desert Shores, Salome, Coyote Wells, Ehrenberg,
El Centro, Imperial Hot Mineral Springs, Plaster City, Midland,
Vicksburg Junction, Brenda, Alamorio, Winona, Fortuna Foothills,
Mountain Spring, Coolidge Springs, Salton City, Quartzsite,
Martinez Lake, and Vicksburg
115 AM MST Mon Aug 18 2025 /115 AM PDT Mon Aug 18 2025/

...EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY EVENING...

* WHAT...Dangerously hot conditions possible. Afternoon temperatures
  106 to 115. Major Heat Risk.

* WHERE...Portions of southwest Arizona and southeast and southern
  California.

* WHEN...From Wednesday morning through Friday evening.

* 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 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.

&&

$$

AZZ534-538-539-541-545-547-549-552>556-559-560-562-182100-
/O.CON.KPSR.XH.A.0005.250820T1700Z-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 Hassayampa, Tortilla Flat, Cactus Forest,
Aguila, Florence, Kaka, Peridot, Scottsdale, Wintersburg, Globe,
Wickenburg, Coolidge, Superior, Gila Bend, Casa Grande,
Arlington, Miami, San Carlos, Fountain Hills, Apache Junction,
Gladden, Punkin Center, Tonopah, and Sentinel
115 AM MST Mon Aug 18 2025

...EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY EVENING...

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

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

* WHEN...From Wednesday morning through Friday evening.

* 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 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.

&&

$$

AZZ537-540-542>544-546-548-550-551-182100-
/O.CON.KPSR.XH.A.0005.250820T1700Z-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 Tempe, Wittmann, Liberty, Circle City,
Queen Creek, Goodyear, Gilbert, Sun Lakes, Sun City West,
Chandler, Peoria, Paradise Valley, Surprise, Phoenix, Mesa,
Avondale, Beardsley, and Cashion
115 AM MST Mon Aug 18 2025

...EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY EVENING...

* WHAT...Dangerously hot conditions possible. Afternoon temperatures
  109 to 114. 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 Wednesday morning through Friday evening.

* 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 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.

&&

$$

MS