Heat Advisory

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
1241 PM PDT Sat May 31 2025

CAZ107-108-111-114-115-010500-
/O.CON.KEKA.HT.Y.0001.000000T0000Z-250601T0500Z/
Northern Trinity-Southern Trinity-Northeastern Mendocino Interior-
Northern Lake-Southern Lake-
Including Covelo, Douglas City, Big Bar, Zenia, Weaverville,
Carrville, Hayfork, Forest Glen, Trinity Center, Knobcone Camp,
Hidden Valley Lake, Clearlake, Junction City, Lakeport, Del Loma,
Finley, Ruth, Hyampom, Helena, Middletown, Clearlake Park,
Peanut, and Gravelly Valley Airport
1241 PM PDT Sat May 31 2025

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING...

* WHAT...Temperatures as high as 101 expected with moderate Heat
  Risk.

* WHERE...Trinity County, Lake County, and Northeastern Mendocino
  Interior.

* WHEN...Until 10 PM PDT this evening.

* 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 hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

EYS

URGENT - WEATHER MESSAGE
National Weather Service Sacramento CA
1217 PM PDT Sat May 31 2025

CAZ013-015>019-063-066-067-010600-
/O.CON.KSTO.HT.Y.0001.000000T0000Z-250601T0600Z/
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-Northeast
Foothills/Sacramento Valley-Motherlode-
Including the cities of Sacramento, Marysville/Yuba City,
Redding, Red Bluff, Paradise, Grass Valley, Jackson, Modesto,
Fairfield/Suisun, Stockton, Alder Springs, Chico, Shasta Dam, and
Oroville
1217 PM PDT Sat May 31 2025

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING...

* WHAT...Dangerously hot conditions with temperatures 99 to 107.
  Moderate HeatRisk with areas of Major HeatRisk expected. Limited
  overnight relief with low temperatures in the 60s to low 70s.

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

* WHEN...Until 11 PM PDT this evening.

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

* ADDITIONAL DETAILS...Area waterways continue to run cold and fast,
  creating dangerous conditions for those seeking relief in rivers
  and lakes.

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.

&&

$$

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

NR