* WHAT...Temperatures from the 90s to near 105 expected.

* WHERE...Santa Clara Valley and eastern hills, interior East Bay,
North Bay interior mountains, Santa Cruz Mountains, Santa Lucia
Range, southern Salinas Valley, Most of San Benito County and the
interior mountains of Monterey County.

* WHEN...From 10 AM Thursday to 10 PM PDT Friday.

* IMPACTS...Hot conditions can cause heat illnesses. 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.

WWUS76 KMTR 201044
NPWMTR

Heat Advisory
National Weather Service San Francisco CA
344 AM PDT Wed Aug 20 2025
CAZ504-510-512>518
/O.CON.KMTR.HT.Y.0004.250821T1700Z-250823T0500Z/
North Bay Interior Mountains-East Bay Interior Valleys-Santa Cruz Mountains-Santa Clara Valley Including San Jose-Eastern Santa Clara Hills-East Bay Hills-Southern Salinas Valley/Arroyo Seco and Lake San Antonio-Santa Lucia Mountains and Los Padres National Forest-Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 10 PM PDT FRIDAY...

* WHAT...Temperatures from the 90s to near 105 expected.

* WHERE...Santa Clara Valley and eastern hills, interior East Bay,
North Bay interior mountains, Santa Cruz Mountains, Santa Lucia
Range, southern Salinas Valley, Most of San Benito County and the
interior mountains of Monterey County.

* WHEN...From 10 AM Thursday to 10 PM PDT Friday.

* IMPACTS...Hot conditions can cause heat illnesses. 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.
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.

Local Weather

Santa Clara, California, US