National Weather Service United States Department of Commerce

Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Overview


Heat can be a killer. The combination of hot weather and high humidity can quickly cause heat-related illness to set in. The National Weather Service issues advisories for high heat to warn you of the dangers. These alerts are issued when an extreme heat event is occurring, is imminent, or has a very high probability of occurrence.

Wet Bulb Globe Temperature Forecast (WBGT)

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