NORMAN, Okla. — Tornadoes ripped through the Southern Plains on Monday as storms that killed five people and injured dozens more blew cars off highways, toppled homes and sent baseball-size hail crashing through windshields. Oklahoma Department of Emergency Management spokesman Jerry Lojka said two people were killed in Oklahoma City and three were killed in Cleveland County, south of the city. Oklahoma City officials said the fatalities there involved a young boy who was hit by debris in his home and a man whose recreational vehicle flipped over on top of him. Details on the Cleveland County deaths weren't immediately available. Officials reported that at least 58 others were injured — two of them critically — in the daylong onslaught. In some neighborhoods in Oklahoma City, emergency workers were going door to door to make sure everyone was accounted for. Power was out to more than 37,000 homes and businesses statewide.