UNDATED (AP) - Sweltering heat is giving way to severe thunderstorms from the Ohio River Valley into the Northeast.
The storms are bringing large hail and damaging winds.
They've brought down trees and power lines in at least three states. More than 100,000 customers are without power in Ohio, Pennsylvania and New York.
There have also been reports of tornadoes. Emergency officials say it may have been a twister that hit Elmira, N.Y., today. Buildings have been damaged and hospitals have been put on disaster status, though there has been no word on injuries. Multiple traffic accidents are being blamed on the storms.
The National Weather Service says it's sending a helicopter to the area to assess the damage and determine if it was a tornado.
There's also been a report of a possible tornado in northwestern Pennsylvania.
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