Heat Persists in the South Central U.S. and California; Heavy Rain in the Ohio Valley

Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley, as well as in the Southwest and California this week with limited nighttime relief. Heavy rainfall will lead to localized areas of flash flooding in parts of the Ohio Valley/Central Appalachians. Dry and breezy conditions will enhance fire weather concerns across the northern Rockies and High Plains. Read More >

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Last Map Update: Wed, Sep 9, 2026 at 8:04:30 pm PDT

Watches, Warnings & Advisories

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National Weather Service San Joaquin Valley, CA

National Weather Service Los Angeles, CA

Extreme Heat Warning

Heat Advisory

Coastal Flood Advisory

Small Craft Advisory

Heat Advisory: Now through Thursday

Minor Coastal Flooding

NOAA Weather Radio Test Postponed

⚠️ HEAT ADVISORY: Now through Thursday 10 PM ⚠️ A Heat Advisory has been issued for the San Francisco Bay Area and Central Coast now through Thursday. Forecast Details: Interior Highs: 90°F to 105°F Coastal Highs: Mid-70s to low-90s Overnight Lows: Mid-60s to low-70s, with higher elevations remaining elevated in the 70s to 80s, offering little overnight relief. Impacts: Heat illness risk will be elevated for anyone spending prolonged time outdoors, particularly during peak afternoon hours or while performing physical exertion. Heat Safety Tips: Drink plenty of water or sports drinks throughout the day—don't wait until you're thirsty. Take frequent breaks in air conditioning or shade. Shift outdoor activities to cooler morning or evening times. Look before you lock: Never leave people or pets inside an unattended vehicle!

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Heat Persists in the South Central U.S. and California; Heavy Rain in the Ohio Valley

NWS Forecast Office San Francisco, CA