203
WWUS76 KMTR 200504
NPWMTR
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1004 PM PDT THU MAR 19 2026
CAZ006-502>506-508>510-512>518-528>530-201900-
/O.CON.KMTR.HT.Y.0001.000000T0000Z-260321T0300Z/
SAN FRANCISCO-MARIN COASTAL RANGE-SONOMA COASTAL RANGE-NORTH BAY
INTERIOR MOUNTAINS-COASTAL NORTH BAY INCLUDING POINT REYES
NATIONAL SEASHORE-NORTH BAY INTERIOR VALLEYS-SAN FRANCISCO BAY
SHORELINE-SAN FRANCISCO PENINSULA COAST-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-
NORTHERN SALINAS VALLEY/HOLLISTER VALLEY AND CARMEL VALLEY-
NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST-
1004 PM PDT THU MAR 19 2026
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY
* WHAT...HIGH TEMPERATURES IN THE LOW TO MID 90S ACROSS THE INTERIOR
AND 80S ALONG THE COASTLINE. REDUCED COOLING OVERNIGHT ESPECIALLY
IN THE HIGHER ELEVATIONS.
* WHERE...THE BAY AREA AND CENTRAL COAST.
* WHEN...UNTIL 8 PM PDT FRIDAY.
* 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. HOT CONDITIONS CAN CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...MUCH ABOVE NORMAL TEMPERATURES IN THE UPPER
80S TO MID 90S ARE EXPECTED THROUGH THE REMAINDER OF THE WEEK
ACROSS THE BAY AREA AND CENTRAL COAST. PORTIONS OF THE INTERIOR
CENTRAL COAST MAY REACH THE UPPER 90S STARTING MID TO LATE WEEK.
OVERNIGHT LOWS IN THE UPPER 50S TO LOW 60S WILL OFFER SOME RELIEF
TO THE LOWER ELEVATIONS BUT WILL OFFER MINIMAL RELIEF WITHIN THE
HIGHER ELEVATIONS. CONDITIONS WILL BE MUCH ABOVE NORMAL ALONG THE
COAST THIS WEEK BUT COASTAL RESIDENTS MAY EXPERIENCE MORE RELIEF
OVERNIGHT THAN THOSE ACROSS THE INTERIOR. THE RISK OF HEAT RELATED
ILLNESSES WILL INCREASE WITH EACH ADDITIONAL DAY OF HEATING FROM
THIS EVENT.
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.
BKM
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