Extreme Weather Hits US: Tropical Storm, Heat Dome, and Toxic Air
Extreme Weather Hits US: Tropical Storm, Heat Dome, and Toxic Air
US · Published Jul 21, 2026
• The United States is facing a series of extreme weather events, including severe thunderstorms, a heat dome, and lingering toxic wildfire smoke. The National Weather Service has issued warnings for flash flooding across the Midwest, Northeast, and Mid-Atlantic regions on July 20 and 21,
• A tropical depression in the Gulf of Mexico is expected to intensify into Tropical Storm Bertha, bringing heavy rain and wind to areas from Texas to the Florida Panhandle. Meanwhile, a heat wave is affecting the central U.S., with heat indices reaching up to 116°F in some areas. Air quality alerts remain active across the Great Lakes and Midwest due to smoke from Canadian wildfires.

Impact & Risks

The Midwest and East Coast face flash flooding risks from severe thunderstorms, while Gulf Coast states may experience heavy rainfall and flooding from the developing tropical storm. The heat dome in the central U.S. poses health risks, especially for vulnerable populations, with extreme heat warnings in effect. Toxic wildfire smoke continues to impact air quality in the Great Lakes and Midwest, potentially exacerbating respiratory issues.

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