HOLDENVILLE, Okla. (AP) — Tornadoes that tore through Oklahoma have flattened buildings across one rural town, killing at least four people, causing widespread power outages and leaving a trail of destruction, Gov. Kevin Stitt said Sunday.Dozens of reported tornadoes have wreaked havoc in the nation's midsection since Friday, with flood watches and warnings in effect Sunday for Oklahoma and other states — including Kansas, Missouri, Arkansas and Texas.In Oklahoma, a tornado ripp