Delaware, New Jersey, Pennsylvania Heat Advisory | Effective 05/20/2026 07:35

Headline: 
Heat Advisory issued May 20 at 10:35AM EDT until May 20 at 8:00PM EDT by NWS Mount Holly NJ
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
May 20, 2026 - 7:35am
Expires: 
May 20, 2026 - 3:45pm
Description: 
* WHAT...Heat index values up to 97. * WHERE...In Delaware, New Castle County. In New Jersey, Mercer, Camden, Gloucester, and Northwestern Burlington Counties. In Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, and Philadelphia Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Area Description: 
New Castle; Mercer; Gloucester; Camden; Northwestern Burlington; Delaware; Philadelphia; Eastern Chester; Eastern Montgomery; Lower Bucks
Forcast Office: 
NWS Mount Holly NJ