National Weather Service
Live Weather Camera in Philadelphia, PA. Extreme heat warning
Extreme Heat Warning issued June 30 at 2:44AM EDT until July 4 at 8:00PM EDT by NWS Mount Holly NJ
Severe
Expected
55 cameras
Active Until
Jul 5, 2026 00:00 UTC
Issued By
NWS Mount Holly NJ
Area
Sussex; Warren; Morris; Hunterdon; Berks; Lehigh; Northampton; Western Chester; Western Montgomery; Upper Bucks
Alert Details
* WHAT...Dangerously hot conditions with heat index values between
100 and 110 degrees expected each day.
* 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 noon Wednesday to 8 PM EDT Saturday.
* 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. The
hottest conditions are expected to occur Thursday through Friday.
Recommended Action
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.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
If you do not have air conditioning in your home or lack shelter,
you can call 211 or visit your county or state health department
website for assistance locating appropriate shelter from the heat.