Crews are evaluating the damage Wednesday after tornadoes destroyed several homes and left two people critically injured in western Kansas as a series of severe storms swept across the Plains.

Meanwhile, one person drowned in central Oklahoma after a vehicle was swept off a road and a 13-year-old boy was found safe in northeastern Arkansas three hours after falling into a flooded drainage pipe.

The most damage in Kansas was reported in Ford and Hodgeman counties, where a storm dropped multiple tornadoes during a two-hour span Tuesday night, said meteorologist Andrew White of the National Weather Service office in Dodge City. He said less damaging tornadoes were reported in two other Kansas counties.

Emergency management officials in Ford County reported that two people were critically injured Tuesday night and taken to a hospital in Dodge City, the Kansas Adjutant General's Department said in a statement early Wednesday.

No fatalities were reported.

Preliminary reports indicate that at least one of the Kansas tornadoes was a half-mile wide. White said crews were working to determine how many tornadoes touched down, their strength and how long they were on the ground.

Besides damaged homes, White says U.S. 50 was temporarily closed because a tractor-trailer was toppled in the storm. He said a large propane tank tipped over and leaked near Dodge City, where 3-inch hail also was reported.

In Oklahoma, the drowning happened early Wednesday when a vehicle was swept into a drainage culvert near the small town of Davenport, about 50 miles northeast of Oklahoma City, the highway patrol said. The National Weather Service said 3 to 6 inches of rain fell in parts of Oklahoma, and that a flood warning was in effect through Wednesday afternoon.

In Arkansas, the boy who fell into a storm drain wasn't seriously hurt. Police Cpl. Jason Chester tells television station KAIT that the boy said he clung to a pole. He was rescued after two officers heard his cries for help and pulled him to safety.

Elsewhere, several structures were damaged when a "probable" tornado touched down in northeast Oklahoma, near Bristow, according to the weather service. The Oklahoma Highway Patrol said no one was injured.

In Michigan's Upper Peninsula, two weak tornadoes snapped pine trees, the National Weather Service said. No injuries were reported. The agency said the first tornado was detected near Republic, Michigan, on Tuesday afternoon and the second a short time later nearby.

Tornado warnings were issued in parts of eastern Colorado and the Texas Panhandle, and the Storm Prediction Center in Norman, Oklahoma, said storms can be expected throughout the week in the Great Plains.