Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

An unusual early Spring heat wave will continue much above-normal temperatures over the Southwest U.S. through early next week. Many locations are likely to set records for the highest-ever March temperature. Periods of critical fire weather will persist from the central Rockies to the central Plains through Saturday as gusty winds and low relative humidity continue. Read More >

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Last Map Update: Thu, Mar 19, 2026 at 11:22:09 am 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

Heat Advisory

Central California Midweek Heat Risk

Cold Water Safety

Widespread Minor Heat Risk is expected for central California including the San Joaquin Valley and Mojave Desert on Wednesday and Thursday. This level of risk can result in heat-related illnesses for those extremely sensitive to heat such as older adults (65+), infants, those without effective cooling, and those with chronic diseases.

Streams and waterways will be rising and running cold and fast this week! As the temperatures become hotter this week, 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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Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

NWS Forecast Office Hanford, CA