# HEADLINE
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EXTREME HEAT WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH SATURDAY EVENING
# DETAILS
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WHAT
Dangerously hot conditions with heat index values up to 108 degrees possible during the daytime hours.
WHERE
In New Jersey, Morris, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, Upper Bucks, Western Chester, and Western Montgomery Counties.
WHEN
From Wednesday afternoon through Saturday evening.
IMPACTS
Heat related illnesses increase significantly during extreme heat and high humidity events.
ADDITIONAL DETAILS
Very warm low temperatures in the low to mid 70s at night will not offer any relief from the heat. This combined with multiple days of near record breaking temperatures will exacerbate the impacts from the heat and humidity.
ISSUED AT
Sunday, June 28, 2026 at 2:11 PM EDT
ISSUED BY
National Weather Service Mount Holly NJ
HEADER
URGENT - WEATHER MESSAGE
# PRECAUTIONARY/PREPAREDNESS ACTIONS
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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.
# AREAS AFFECTED
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Berks, Hunterdon, Lehigh, Morris, Northampton, Sussex, Upper Bucks, Warren, Western Chester, Western Montgomery
Including the cities of Flemington, Allentown, Honey Brook, Chalfont, Morristown, Washington, Newton, Reading, Pottstown, Bethlehem, Oxford, Perkasie, Collegeville, and Easton