Tornadoes have raked the southern Plains region in the United States, hitting a local zoo, overturning cars on an Oklahoma City interstate and destroying dozens of homes.
No deaths were immediately reported from the tornadoes that hit Oklahoma and rural parts of Kansas and Nebraska on Wednesday.
In Grady County, all animals were accounted for after a zoo about 40 kilometres southwest of Oklahoma City was hit by a tornado, Alisa Voegeli, a dispatcher at the sheriff's office, said.
The worst damage seemed to be in the Oklahoma City area. A twister destroyed homes at Bridge Creek, Amber and Blanchard, southwest of the city, and it appeared another tornado touched down later Wednesday evening when a second storm came through the area.
"We have damage reports, so we do strongly think there was a tornado on the south side of Oklahoma City," meteorologist Michael Scotten with the National Weather Service in Norman said after the second storm that hit around 8:40 p.m.
Lara O'Leary, a spokeswoman for Emergency Medical Services Authority said late Wednesday that the company transported 12 patients from a trailer park in south Oklahoma City to local hospitals. She did not have further details about the extent of the patients' injuries.
The storms dumped up to 15 centimetres in the southern part of Oklahoma City, prompting the city to issue a flash flood emergency for the first time in its history, said city spokeswoman Kristy Yager. Road crews were waiting for the storms to abate to set up barricades and evaluate trouble spots.
O'Leary said the ambulance service responded to water rescues "all over" the Oklahoma City metro area. Two ambulance crews required also assistance after getting stuck in high water, she said.
The Storm Prediction Center had warned that bad weather would come to Tornado Alley, and more storms were possible later in the week, with flooding a major concern.
In Oklahoma, Grady County Emergency Management Director Dale Thompson said about 10 homes were destroyed in Amber and 25 were destroyed in Bridge Creek. As the storm moved to the east, forecasters declared a tornado emergency for Moore, where seven schoolchildren were among 24 people killed in a storm two years ago. When the first of the storms moved through Wednesday, school districts held their pupils in safe places.
At Will Rogers World Airport in Oklahoma City, people were twice evacuated into a tunnel outside the security zone.
In Nebraska, 10 to 15 homes were damaged near Grand Island, and between Hardy and Ruskin, near the Kansas line.
At least nine tornadoes were reported in Kansas, the strongest of them in the sparsely populated north-central part of the state.