133
WWUS75 KTWC 211638
NPWTWC

URGENT - WEATHER MESSAGE
National Weather Service Tucson AZ
938 AM MST Thu Aug 21 2025

AZZ502-504>506-220400-
/O.NEW.KTWC.DU.Y.0015.250821T2300Z-250822T0400Z/
/O.CON.KTWC.XH.W.0006.000000T0000Z-250823T0300Z/
Tohono O`odham Nation-Tucson Metro Area-South Central Pinal
County-Southeast Pinal County-
Including the cities of Marana, Green Valley, Mammoth, Oracle,
Sells, Vail, Picacho Peak State Park, and Tucson
938 AM MST Thu Aug 21 2025

...BLOWING DUST ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 9 PM
MST THIS EVENING...
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST FRIDAY...

* WHAT...For the Extreme Heat Warning, dangerously hot conditions
  with temperatures ranging from 105 to 110 across much of Pima and
  southeastern Pinal counties leading to Major Heat Risk. In other
  areas of southeastern Arizona, high temperatures will range from
  100 to 105 degrees. For the Blowing Dust Advisory, visibility
  between one-quarter and one mile in blowing dust expected.

* WHERE...South Central Pinal County, Southeast Pinal County, Tohono
  O`odham Nation, and Tucson Metro Area.

* WHEN...The Extreme Heat Warning is in effect now until 8 PM MST
  Friday. The Blowing Dust Advisory will be in effect from 4 PM this
  afternoon to 9 PM MST this evening.

* IMPACTS...Hazardous driving conditions due to reduced visibility.
  Heat related illnesses increase significantly during extreme heat
  events.

* ADDITIONAL DETAILS...Major Heat Risk is when heat will affect
  anyone without cooling or hydration as well as health systems and
  industries.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons with respiratory problems should make preparations to stay
indoors until the storm passes. Be ready for a sudden drop in
visibility to near zero. If you encounter blowing dust or blowing
sand on the roadway or see it approaching, pull off the road as far
as possible and put your vehicle in park. Turn the lights all the
way off and keep foot off the brake pedal. Remember, `Pull Aside,
Stay Alive`.

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.

&&

$$

AZZ501-503-507-509-220400-
/O.CON.KTWC.XH.W.0006.000000T0000Z-250823T0300Z/
Western Pima County-Upper Santa Cruz River Valley/Altar Valley-
Upper San Pedro River Valley-Upper Gila River Valley-
Including the cities of Sierra Vista, Safford, Ajo, Benson,
Clifton, Organ Pipe Cactus N.M., and Nogales
938 AM MST Thu Aug 21 2025

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST FRIDAY...

* WHAT...Dangerously hot conditions with temperatures ranging from
  105 to 110 across much of Pima and southeastern Pinal counties
  leading to Major Heat Risk. In other areas of southeastern
  Arizona, high temperatures will range from 100 to 105 degrees.

* WHERE...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.

* ADDITIONAL DETAILS...Major Heat Risk is when heat will affect
  anyone without cooling or hydration as well as health systems and
  industries.

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.

&&

$$

KM