NWS Mount Holly NJXH.W 0001June 30, 2026
Extreme Heat Warning: New Castle, Mercer, Salem and 8 more, DE and NJ
The National Weather Service office in Mount Holly issued an extreme heat warning for New Castle, Mercer, Salem and 8 more in Delaware, New Jersey, Pennsylvania, which was in force until 8:00 p.m. local time on July 4. It was the 1st extreme heat warning the NWS office in Mount Holly issued in 2026.
ExpiredWarning
In force for 3 days; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Mount Holly NJ
- Area
- New Castle, Mercer, Salem and 8 more
- State
- Delaware
- Level
- Warning
- Issued
- 2:44 a.m. EDT, June 30, 2026
- In force from
- 12:00 p.m. EDT, July 1, 2026
- Expires
- 8:00 p.m. EDT, July 4, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KPHI XH.W 0001
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
* WHAT...Dangerously hot conditions with heat index values between 100 and 110 degrees expected each day. * WHERE...Portions of northern Delaware, central and southern New Jersey, and southeast Pennsylvania. * 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 mid 70s to low 80s 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.
What the agency told people to do
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.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.