At least four people were killed in Pennsylvania on Tuesday and hundreds of thousands of customers were without power after severe weather that had torn across the High Plains and Upper Midwest earlier this week pushed into the Northeast and Canada.

A man in Pittsburgh was killed after being electrocuted by live wires, according to the city’s Public Safety Department. The man, whose name was not immediately released, was pronounced dead at the scene.

Another resident, Raymond Gordon, 67, was returning to his home when he was fatally hit by a tree after it blew over, according to the Ross Township Police Department near Pittsburgh.

In Centre County, Pa., a 22-year-old man was also killed after being electrocuted while trying to put out a mulch fire during the severe weather, the State College Police Department said in a statement.

In Greene County, Pa., apassenger in a car was killed when a tree fell on top of it, the Pennsylvania State Police said in its statement about weather-related calls. The passenger, Andrew Celaschi, was struck by a falling tree that was blown over by high winds, the authorities said.

The National Weather Service office in Pittsburghsaid on Wednesday that it had crews in Wilkinsburg, a borough in Allegheny County, Pa., looking for potential tornado damage from Tuesday’s severe weather.