Tornado sirens sounded across Oklahoma City early Saturday as the nation's midsection braced for what forecasters cautioned could be a day of "life-threatening" storms, with the most dangerous weather expected to develop in the afternoon.
At least three possible tornadoes were reported west and north of the city, though no injuries were immediately reported, said Oklahoma Department of Emergency Management official Michelann Ooten. The National Weather Service, which is working to confirm the tornadoes, said the storms damaged some homes.
The most dangerous weather, however, is expected to develop later in the day. Officials are warning that a large area spanning from Minnesota to Texas could be at risk.