Extreme Heat Warning Issued for Parts of Delaware, New Jersey, and Pennsylvania
The National Weather Service (NWS) Mount Holly NJ has issued an Extreme Heat Warning for portions of Delaware, New Jersey, and Pennsylvania. The warning is in effect from 10 AM to 8 PM EDT on Wednesday, July 15, 2026.
Dangerously hot conditions are expected, with heat index values potentially reaching up to 107 degrees. The affected areas include New Castle County in Delaware; Mercer, Camden, Gloucester, and Northwestern Burlington Counties in New Jersey; and Delaware, Eastern Montgomery, Lower Bucks, and Philadelphia Counties in Pennsylvania.
Heat-related illnesses are expected to increase significantly during this period of extreme heat and high humidity. While the hottest conditions are anticipated on Wednesday, July 15, heat indices are also expected to climb into the mid-90s today, July 14.
The NWS Mount Holly NJ issued the Extreme Heat Warning on July 14 at 2:38 AM EDT. The warning covers the specified regions for Wednesday, July 15, from 10 AM to 8 PM EDT.