Historic Heat Wave

A record-breaking heat wave is scorching much of the eastern US, with some cities seeing their hottest June temperatures in over a decade. Driven by a powerful heat dome, temperatures have soared 15 to 20 degrees above normal—New York City exceeded its 1888 record Tuesday of 96 degrees—and heat indexes have climbed over 100 degrees in several cities. See updates here.

Millions remain under heat alerts as the multiday heat wave strains power grids, sparks outages, and disrupts travel, including damaged infrastructure such as buckled roads. Hot days often feel hotter due to high humidity, trapped heat, and elevated dew points, making conditions feel like a sauna. Urban areas are especially vulnerable due to the heat island effect, as asphalt and concrete trap heat overnight. Meteorologists say some relief is expected heading into the weekend.

Separately, Tropical Storm Andrea formed Tuesday in the Atlantic, becoming the first named storm of the 2025 hurricane season. It is not expected to impact any land.