Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

More than 125 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

New US map reveals how big states would be — if they were resized by population By . Adriana Diaz. Published Feb. 25, 2025, 5:34 p.m. ET. Maybe size does matter.

The United States has the third-largest population in the world, but nearly a third of the country's 340 million residents live in just three states, a new map reveals.