Dangerous Heat Wave Persists Across Southern US, Expanding to Central and Southern Plains

A dangerous heat wave is forecast to persist across the Southern United States, expanding into the Central and Southern Plains, with widespread Major to locally Extreme HeatRisk through July 26, 2026. Heat index values are expected to reach 41-46°C (105-115°F). Heat Advisories and Extreme Heat Warnings are in effect for various regions, including Louisiana, Southeast Texas, Southern California, and the Mid-South.