Amazingly no one was hurt in this massive explosion in a small West Virginia town. It happened Monday night when a train carrying more than 100 crude oil tankers derailed during a snowstorm.

The explosion in Fayette County triggered one house fire and officials declared a state of emergency.

There are now concerns about oil seeping into the local water supply after one tanker ended up in a river.

David McClung said he felt the heat from one of the explosions at his home about a half mile up the hill.

"It was a little scary. It was like an atomic bomb went off," he said. One of the explosions that followed sent a fireball at least 300 feet into the air, McClung said.

AP reported:

Fires burned for hours after a train carrying more than 100 tankers of crude oil derailed in a snowstorm in West Virginia, plunging at least one tanker into a river while sending a fireball skyward, authorities and residents say.

Federal railroad and hazardous materials officials are probing Monday's derailment. One person was treated for potential inhalation issues, but no other injuries were reported, the train company CSX said in a statement.

The office of Gov. Earl Ray Tomblin said the tanker cars were loaded with Bakken crude from North Dakota and headed to Yorktown, Virginia.

Officials evacuated hundreds of families and shut down two water treatment plants threatened by oil seeping into the river. Authorities say fire crews opted to let the tanker cars burn themselves out.

Watch raw video of the explosion and fire below.