577
WWUS76 KSTO 211858
NPWSTO

URGENT - WEATHER MESSAGE
National Weather Service Sacramento CA
1158 AM PDT Thu Aug 21 2025

CAZ013-015>019-063-222300-
/O.CON.KSTO.HT.Y.0004.250822T1800Z-250824T0600Z/
Shasta Lake Area / Northern Shasta County-Northern Sacramento
Valley-Central Sacramento Valley-Southern Sacramento Valley-
Carquinez Strait and Delta-Northern San Joaquin Valley-Mountains
Southwestern Shasta County to Western Colusa County-
Including the cities of Alder Springs, Sacramento, Modesto,
Oroville, Chico, Red Bluff, Marysville/Yuba City,
Fairfield/Suisun, Stockton, Redding, and Shasta Dam
1158 AM PDT Thu Aug 21 2025

...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT
SATURDAY...

* WHAT...High temperatures 95 to 107 expected. Overnight low
  temperatures in the mid 60s to 70s. Widespread Moderate HeatRisk
  with areas of Major HeatRisk.

* WHERE...Carquinez Strait and Delta, Central Sacramento Valley,
  Mountains Southwestern Shasta County to Western Colusa County,
  Northern Sacramento Valley, Northern San Joaquin Valley, Shasta
  Lake Area / Northern Shasta County, and Southern Sacramento Valley.

* WHEN...From 11 AM Friday to 11 PM PDT Saturday.

* IMPACTS...Heat related illnesses increase significantly during
  heat events, particularly for those working or participating in
  outdoor activities.

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.

&&

$$

For more information, visit us at www.weather.gov/sto/

Forrest