Winds gusting up to 45 mph knocked down trees and power lines in Lancaster County on Wednesday.
Duke Energy spokesman Rick Jiran said about 69,000 customers lost power between late Tuesday night and Wednesday night.
About 375 homes lost power in Lancaster County, mostly east of the Lancaster city limits, Jiran said.
Heavy rain preceded the gusty winds, softening the soil and making it easier for trees to fall onto power lines, Jiran said.
“It really wreaked havoc on our system,” he said.