251
WWUS75 KSLC 201039
NPWSLC

URGENT - WEATHER MESSAGE
National Weather Service Salt Lake City UT
439 AM MDT Thu Aug 20 2026

UTZ101>106-210145-
/O.CON.KSLC.HT.Y.0008.260820T1800Z-260822T1300Z/
Great Salt Lake Desert and Mountains-Tooele and Rush Valleys-
Eastern Box Elder County-Northern Wasatch Front-Salt Lake Valley-
Utah Valley-
Including the following locations - Payson, Salt Lake City,
Sandy, Wendover, Snowville, Lehi, Vernon, Park Valley, West Jordan,
Brigham City, Bountiful, Dugway, Provo, Grantsville, Tooele, and
Ogden
439 AM MDT Thu Aug 20 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 AM MDT
SATURDAY...

* WHAT...High temperatures to around 100 degrees expected alongside
  overnight low temperatures in the low- to mid-70s.

* WHERE...The Wasatch Front, Great Salt Lake Desert and Mountains,
  and Tooele and Rush Valleys.

* WHEN...From noon today to 7 AM MDT Saturday.

* IMPACTS...Hot temperatures may cause heat illness. Warm overnight
  temperatures will limit the amount of relief from the hot daytime
  temperatures, bringing a period of prolonged heat exposure,
  especially for vulnerable populations.

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.

&&

$$

UTZ115-116-210145-
/O.CON.KSLC.HT.Y.0008.260820T1800Z-260821T1300Z/
Western Millard and Juab Counties-Eastern Juab/Millard Counties-
Including the following locations - Scipio, Nephi, Little Sahara,
Fillmore, and Delta
439 AM MDT Thu Aug 20 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 AM MDT
FRIDAY...

* WHAT...High temperatures to around 100 degrees expected alongside
  overnight low temperatures in the upper-60s to low-70s.

* WHERE...Eastern Juab/Millard Counties and Western Millard and Juab
  Counties.

* WHEN...From noon today to 7 AM MDT Friday.

* IMPACTS...Hot temperatures may cause heat illness. Warm overnight
  temperatures will limit the amount of relief from the hot daytime
  temperatures, bringing a period of prolonged heat exposure,
  especially for vulnerable populations.

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

HM