Extreme Heat Warning

Locations Affected

Philadelphia, PA ∙ Allentown, PA ∙ Reading, PA ∙ Trenton, NJ ∙ Wilmington, DE ∙ Bethlehem, PA ∙ Camden, NJ ∙ New Brunswick, NJ ∙ Perth Amboy, NJ ∙ Leesport, PA

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 206 AM EDT Sat Jun 21 2025 ...EXTREME HEAT WARNING IN EFFECT FROM 8 AM SUNDAY TO 8 PM EDT WEDNESDAY... * WHAT...Dangerously hot conditions with heat index values up to 108 expected. * WHERE...Portions of east central and southeast Pennsylvania. * WHEN...From 8 AM Sunday to 8 PM EDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...The highest temperatures and heat indices will be Monday and Tuesday. Low temperatures near 75 to 80 degrees will not offer much relief at night. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

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