The dangerous heat dome that gripped the northeastern United States through the July 4 weekend is finally weakening — but public health officials are warning that the medical emergency is not over.
The National Weather Service confirmed Sunday that cooler air is beginning to push the heat dome south, providing gradual relief to New York City, Boston, and Philadelphia. But the agency issued a specific continued warning: high humidity and overnight lows remaining in the 70s to near 80°F in many areas will continue to pose an elevated risk of heat-related illness — particularly for households still without power, those with elderly or ill residents, and anyone who assumed the heat emergency was finished.