Trenton, N.J. – Temperatures across New Jersey, eastern Pennsylvania, and northern Delaware are set to soar past safe levels starting Sunday morning, with heat index values expected to reach as high as 108°F and offer little overnight relief.
According to the National Weather Service in Mount Holly, an Extreme Heat Warning remains in effect from 8 a.m. Sunday through 8 p.m. Wednesday for a wide swath of the region, including Philadelphia, Trenton, Allentown, Wilmington, Camden, and Freehold. High humidity will drive the heat index to dangerous levels, with the worst conditions expected Monday and Tuesday.
Communities in Mercer, Middlesex, Morris, Camden, Gloucester, and Ocean Counties, among others, should prepare for multi-day heat stress. Nighttime lows will hover between 75–80°F, preventing homes from cooling and putting vulnerable residents at risk.
Officials urge residents to stay indoors with air conditioning, check on elderly neighbors, and avoid strenuous activity outdoors. Public cooling centers are expected to open, and anyone without access to shelter can dial 2-1-1 for assistance.
The heat will linger through midweek, with forecasters warning of potential additional advisories if the dangerous conditions persist. Residents should monitor local alerts and avoid non-essential travel during peak heat hours.
