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Excessive Heat Warning — Great Salt Lake Desert and Mountains, UT, Tooele and Rush Valleys, UT, Northern Wasatch Front, UT, Salt Lake Valley, UT, Western Millard and Juab Counties, UT, Castle Country, UT, San Rafael Swell, UT, Lower Washington County, UT, Zion National Park, UT, Glen Canyon Recreation Area/Lake Powell, UT, South Central Utah, UT, Capitol Reef National Park and Vicinity, UT, Western Canyonlands, UT, Eastern Box Elder County, UT, Utah Valley, UT, Cache Valley/Utah Portion, UT, Western Uinta Basin, UT, Eastern Juab/Millard Counties, UT, Sanpete Valley, UT, Sevier Valley, UT, Southwest Utah, UT, Upper Sevier River Valleys, UT, Bryce Canyon Country, UT
Issued
Expires
1:00 AM CDT · Mon, Aug 10 2026
Issuing Office
NWS KSLC

Affected Areas

Great Salt Lake Desert and Mountains, UT Tooele and Rush Valleys, UT Northern Wasatch Front, UT Salt Lake Valley, UT Western Millard and Juab Counties, UT Castle Country, UT San Rafael Swell, UT Lower Washington County, UT Zion National Park, UT Glen Canyon Recreation Area/Lake Powell, UT South Central Utah, UT Capitol Reef National Park and Vicinity, UT Western Canyonlands, UT Eastern Box Elder County, UT Utah Valley, UT Cache Valley/Utah Portion, UT Western Uinta Basin, UT Eastern Juab/Millard Counties, UT Sanpete Valley, UT Sevier Valley, UT Southwest Utah, UT Upper Sevier River Valleys, UT Bryce Canyon Country, UT

Official Bulletin

321
WWUS75 KSLC 070502
NPWSLC

URGENT - WEATHER MESSAGE
National Weather Service Salt Lake City UT
1102 PM MDT Thu Aug 6 2026

UTZ123-124-131-072015-
/O.CON.KSLC.XH.W.0005.000000T0000Z-260809T0300Z/
Lower Washington County-Zion National Park-Glen Canyon Recreation
Area/Lake Powell-
Including the cities of Big Water, St George, Ivins, Springdale,
Hurricane, and Bullfrog
1102 PM MDT Thu Aug 6 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY...

* WHAT...Dangerously hot conditions with temperatures up to 110
  expected, with some locations in the St George area nearing 112.
  Little overnight relief will occur through Saturday.

* WHERE...Glen Canyon Recreation Area/Lake Powell, Lower Washington
  County, and Zion National Park.

* WHEN...Until 9 PM MDT Saturday.

* 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 when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

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.

&&

$$

UTZ128>130-072015-
/O.CON.KSLC.XH.W.0005.000000T0000Z-260809T0300Z/
South Central Utah-Capitol Reef National Park and Vicinity-
Western Canyonlands-
Including the cities of Torrey, Loa, Escalante, Hanksville, and Kanab
1102 PM MDT Thu Aug 6 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY...

* WHAT...Dangerously hot conditions with temperatures up to 105
  expected with little overnight relief through Saturday.

* WHERE...Capitol Reef National Park and Vicinity, South Central
  Utah, and Western Canyonlands.

* WHEN...Until 9 PM MDT Saturday.

* 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 when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

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.

&&

$$

UTZ101-102-104-105-115-120-121-072015-
/O.CON.KSLC.XH.W.0005.260807T1800Z-260810T0600Z/
Great Salt Lake Desert and Mountains-Tooele and Rush Valleys-
Northern Wasatch Front-Salt Lake Valley-Western Millard and Juab
Counties-Castle Country-San Rafael Swell-
Including the cities of Delta, Goblin Valley, Tooele, Emery, Dugway,
Park Valley, Little Sahara, West Jordan, Ogden, Castle Dale, Vernon,
Green River, Price, Grantsville, Sandy, Salt Lake City, Wendover, and
Bountiful
1102 PM MDT Thu Aug 6 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT FROM NOON FRIDAY TO
MIDNIGHT MDT SUNDAY NIGHT...

* WHAT...Dangerously hot conditions with temperatures up to 103
  expected with little overnight relief through Sunday.

* WHERE...Castle Country, San Rafael Swell, Western Millard and Juab
  Counties, Great Salt Lake Desert and Mountains, Northern Wasatch
  Front, Salt Lake Valley, and Tooele and Rush Valleys.

* WHEN...From noon Friday to midnight MDT Sunday Night.

* 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 when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

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.

&&

$$

UTZ118-119-122-126-127-072015-
/O.CON.KSLC.HT.Y.0007.000000T0000Z-260809T0300Z/
Sanpete Valley-Sevier Valley-Southwest Utah-Upper Sevier River
Valleys-Bryce Canyon Country-
Including the cities of Beaver, Manti, Salina, Panguitch, Ephraim,
Milford, Cedar City, Koosharem, Bryce Canyon City, Circleville,
Richfield, and Mt Pleasant
1102 PM MDT Thu Aug 6 2026

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY...

* WHAT...Hot conditions with temperatures up to 100 expected with
  overnight lows in the mid-60s.

* WHERE...Sanpete Valley, Sevier Valley, Bryce Canyon Country, Upper
  Sevier River Valleys, and Southwest Utah.

* WHEN...Until 9 PM MDT Saturday.

* IMPACTS...Hot temperatures may cause heat illnesses.

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.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

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.

&&

$$

UTZ103-106-107-114-116-072015-
/O.CON.KSLC.HT.Y.0007.260807T1800Z-260810T0600Z/
Eastern Box Elder County-Utah Valley-Cache Valley/Utah Portion-
Western Uinta Basin-Eastern Juab/Millard Counties-
Including the cities of Lehi, Snowville, Brigham City, Nephi,
Duchesne, Smithfield, Scipio, Payson, Roosevelt, Provo, Fillmore, and
Logan
1102 PM MDT Thu Aug 6 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO MIDNIGHT MDT
SUNDAY NIGHT...

* WHAT...Hot conditions with temperatures in the upper-90s to
  low-100s expected with overnight lows in the mid-60s to around 70.

* WHERE...Eastern Juab/Millard Counties, Cache Valley/Utah Portion,
  Eastern Box Elder County, Utah Valley, and Western Uinta Basin.

* WHEN...From noon Friday to midnight MDT Sunday Night.

* IMPACTS...Hot temperatures may cause heat illnesses.

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.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

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.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/saltlakecity.

For information on potential travel impacts visit
http://udottraffic.utah.gov

Webber