Residents of northern Arizona are cleaning up after four tornadoes hit the area on Wednesday, destroying many homes and forcing dozens to evacuate. No serious injuries were reported.

The twisters derailed 28 cars of a parked freight train, blew semi-trucks off the highway, and blew out the windows in dozens of homes.

Such a severe storm system is very rare for the Grand Canyon State.

"The hammering that northern Arizona is getting right now is exceptional," said National Weather Service meteorologist Ken Waters in Phoenix. "It's not uncommon this time of year to have one or two tornado reports or a warning, but this is quite an outbreak for them. It's very, very unusual."

The small town of Bellemont was hit the hardest by the storm.  Many homes suffered severe wind damage and about 30 people were evacuated.  One family was trapped by the storm debris and had to be rescued.

Although the National Weather Service said 22 tornado warnings were issued, only the four twisters were confirmed to have touched down.