Excessive Heat — Delaware, Pennsylvania

2025-07-17 · Delaware, Pennsylvania

Event narrative

The heat index at Philadelphia International Airport reached 106 degrees, and at Wilmington Airport it reached 105 degrees.

Wider weather episode

A Bermuda high pressure and approaching cold front combined to produce a surge of heat and humidity across the region.

Source: NOAA Storm Events Database, event_id 1278947. Narrative written by the NWS forecast office that issued the report.