(CNN) — Dangerous heat peaked today for millions in the central United States as a heat dome in summer’s hottest month lives up to its reputation — but sauna-like conditions are only just beginning for areas farther east.
The first heat-related death of the 2025 season was confirmed in Dallas County, according to the Dallas County Health and Human Services — a man in his 60s with “unknown pre-existing medical conditions.”
The heat index — how hot it actually feels given the temperature and humidity — topped out in the 100s from the Gulf Coast to the Midwest Thursday afternoon while it soared above 110 degrees in parts of the Mississippi Valley…