Thunderstorms broke the heat in the northeast, but also knocked out power to thousands and caused flash flooding in some areas.
Utilities in New Jersey say that at one point Monday, more than 300,000 customers did not have service.
The storms packed wind gusts of 60 to 70 mph and downed trees and power lines. Several trees fell on homes, though no major injuries were reported.
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The storms broke a spate of hot weather in which temperatures and humidity combined to make it feel like it was over 100 degrees in parts of the northeast.
The Associated Press wire services contributed to this report.