Dangerous Heatwave Across the Western U.S; Hazardous Heat in the Southeast and Mid-Atlantic

Intense and long duration heat building in the West will become more widespread today and Saturday. Excessive heat should expand northward into the Pacific Northwest and Intermountain West, continuing through much of next week. The focus for hazardous heat will shift from the south-central and interior southern U.S. towards the Mid-Atlantic and Southeast today and Saturday. Read More >

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Last Map Update: Fri, Jul 5, 2024 at 7:22:17 am PDT

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Excessive Heat Warning

Red Flag Warning

Heat Advisory

Small Craft Advisory

Marine Weather Statement

Air Quality Alert

Dangerous Heat

Red Flag Warning

Fire Danger for the Holiday Week

Cold Water Safety

Temperatures are expected to reach dangerous levels across the San Joaquin Valley, West Side Hills, Sierra Foothills, Yosemite Valley, Kern River Valley and Kern County Deserts through the holiday week, this weekend, and into next week. Please keep in mind to stay hydrated and cool.

Any use of incendiary devices will greatly increase the risk of quick starting, fast spreading grass fires under what are typically low to moderate wind speeds. This is because of an abnormal amount of herbaceous fuels. Outdoor burning is not recommended.

Elevated fire danger will be present across California this week due to widespread afternoon temperatures near 110 degrees, minimum relative humidity less than 20%, and dry fuel loads throughout the central valley. Take appropriate measures to mitigate the initiation and spread of grass fires, including foregoing the use of fireworks for the Fourth of July.

Warm air temperatures do not mean warm water temperatures. Cold water can very quickly remove heat from the body and lead to a loss of movement in the limbs. When heading into rivers and streams, always take precautions such as wearing a life vest, bringing a life preserver with you, and following all river/stream closures.