Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

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Last Map Update: Sat, Mar 21, 2026 at 1:56:19 pm PDT

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Extreme Heat Warning

Gale Warning

Heat Advisory

Small Craft Advisory

Marine Weather Statement

Minor Heat Risk Continues

Cold Water Safety

Above average temperatures will produce a minor Heat Risk in Central California including the San Joaquin Valley and Mojave Desert through the next several days. This will impact mainly the most sensitive groups. The definition and actions to take are provided in the graphic.

Streams and waterways will be running cold and fast! As warmer than normal temperatures continue, waterways may be inviting. However, the water will flow dangerously fast and cold. It is recommended to stay out of these waterways and streams, as this will cause adverse impacts to even the most experienced swimmers. Also heed instructions from law enforcement.

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Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

NWS Forecast Office Hanford, CA