A Severe Thunderstorm Watch issued by the National Weather Service is in effect for Westchester, Rockland and Putnam counties through 1 a.m. Sunday.
The storms could be accompanied by damaging winds, thunder and lightning.
Torrential rain could lead to flash flooding, the National Weather Service said. It advises motorists not to drive vehicles through flooded roadways.
An Excessive Heat Warning remains in effect through 10 p.m. Sunday.
More than 2,000 households in Westchester were without power early Saturday evening as a result o heavy usage with most of the outages reported in Yonkers, according to Con Ed.
Sunday calls for partly sunny skies and a high at or near 95 degrees. Scattered showers and thunderstorms, mainly after noon, could produce gusty winds and heavy rain.
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