At least three people were killed and more than 1,000 evacuated Thursday after South Korea was hit by torrential rains, officials said, with one region pummeled by the most rainfall per hour since full records began.

South Korea typically experiences monsoon rains in July, but three areas in the country’s South Chungcheong province this week saw some of the heaviest hourly downpours on record, official weather data showed.

Three people were killed Thursday, the Ministry of Interior and Safety said, all in South Chuncheong province.