Workers clear tree branches covering a fishing boat following storms and tornado warnings in Three Rivers, Mich., March 7.

A drone view shows skiers at Boreal Mountain ski resort in the Sierra Nevada mountains in Soda Spring Feb. 22.

Nevada County Sheriff Shannan Moon replies to a question during a press conference after a group of skiers went missing in an avalanche in the…

A snowmobile is parked at Alder Creek Adventure Center, one of two sites where search crews were launched to try to locate a group of missing …

A rescue team departs to the site of an avalanche in a backcountry slope of California's Sierra Nevada mountains in Nevada County Tuesday.

Federal Emergency Management Agency employees work ahead of a press conference at the FEMA National Response Coordination Center in Washington…

The scene of a fatal crash of 13 schoolchildren who perished ​when their minibus collided with a truck in Johannesburg, South Africa, Jan. 19.

Police and firefighters inspect the scene of a commuter train derailment, after a containment wall fell on the track due to heavy rain, killin…

Smoke rises from explosions in Caracas, Venezuela, Saturday.

A woman wearing a bathrobe walks outside of a building, after an earthquake, in Mexico City Friday.