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Heat Advisory — Sonoma Coastal Range, CA, North Bay Interior Mountains, CA, East Bay Interior Valleys, CA, Santa Cruz Mountains, CA, Santa Clara Valley Including San Jose, CA, Eastern Santa Clara Hills, CA, East Bay Hills, CA, Santa Lucia Mountains and Los Padres National Forest, CA, Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park, CA
Issued
12:00 PM CDT · Sat, Aug 8 2026
Expires
12:00 AM CDT · Mon, Aug 10 2026
Issuing Office
NWS KMTR

Affected Areas

Sonoma Coastal Range, CA North Bay Interior Mountains, CA East Bay Interior Valleys, CA Santa Cruz Mountains, CA Santa Clara Valley Including San Jose, CA Eastern Santa Clara Hills, CA East Bay Hills, CA Santa Lucia Mountains and Los Padres National Forest, CA Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park, CA

Official Bulletin

231
WWUS76 KMTR 071706
NPWMTR

URGENT - WEATHER MESSAGE
National Weather Service San Francisco CA
1006 AM PDT Fri Aug 7 2026

CAZ516-081700-
/O.EXA.KMTR.HT.Y.0012.260808T1700Z-260810T0500Z/
Southern Salinas Valley/Arroyo Seco and Lake San Antonio-1006 AM PDT Fri Aug 7 2026

...HEAT ADVISORY IN EFFECT FROM 10 AM SATURDAY TO 10 PM PDT SUNDAY...

* WHAT...Daytime highs in the mid 90s to low 100s. Nighttime lows in
  the mid 60s to low 80s (especially in the higher elevations).

* WHERE...Southern Salinas Valley/Arroyo Seco and Lake San Antonio
  County.

* WHEN...From 10 AM Saturday to 10 PM PDT Sunday.

* IMPACTS...This level of heat affects most individuals sensitive to
  heat, especially those without effective cooling and/or adequate
  hydration. Impacts possible in some health systems and in
  heat-sensitive industries.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Hydration is a critical piece to surviving the heat. Drink water, and
if possible, take water to those who are vulnerable.

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

Beat the heat and check the backseat! Do not leave young children or
pets in unattended vehicles. Car interiors will reach lethal
temperatures in a matter of minutes.

Cooling shelters may be available in your area. Check with your city
or county office of emergency management for locations and sign up
for local alerts via alertthebay.org.

&&

$$

CAZ503-504-510-512>515-517-518-081700-
/O.CON.KMTR.HT.Y.0012.260808T1700Z-260810T0500Z/
Sonoma Coastal Range-North Bay Interior Mountains-East Bay
Interior Valleys-Santa Cruz Mountains-Santa Clara Valley
Including San Jose-Eastern Santa Clara Hills-East Bay Hills-Santa
Lucia Mountains and Los Padres National Forest-Mountains of San
Benito County And Interior Monterey County including Pinnacles
National Park-1006 AM PDT Fri Aug 7 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 10 PM PDT
SUNDAY...

* WHAT...Daytime highs in the mid 90s to low 100s. Nighttime lows in
  the mid 60s to low 80s (especially in the higher elevations).

* WHERE...The Santa Clara Valley and Eastern Hills, The East Bay
  Hills and Valleys, Western Sonoma County Hills, The Santa Cruz
  Mountains, Interior Monterey County and the Santa Lucia Range, Most
  of San Benito County and the Cholame Hills in Southeast Monterey
  County, and North Bay Interior Mountains.

* WHEN...From 10 AM Saturday to 10 PM PDT Sunday.

* IMPACTS...This level of heat affects most individuals sensitive to
  heat, especially those without effective cooling and/or adequate
  hydration. Impacts possible in some health systems and in
  heat-sensitive industries.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Hydration is a critical piece to surviving the heat. Drink water, and
if possible, take water to those who are vulnerable.

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

Beat the heat and check the backseat! Do not leave young children or
pets in unattended vehicles. Car interiors will reach lethal
temperatures in a matter of minutes.

Cooling shelters may be available in your area. Check with your city
or county office of emergency management for locations and sign up
for local alerts via alertthebay.org.

&&

$$

RGass