Discarded nitrous oxide canisters are exploding in waste incinerators causing staff safety concerns.

Officials said one firefighter was released from the hospital, while the other two remained hospitalized overnight.

UPDATE: 2 Canby schools close in wake of large explosion that blew roof off metals plant Canby officials asked residents and businesses near an industrial facility to evacuate Tuesday afternoon ...

Crews are currently battling a large fire after a natural gas line exploded at a commercial building in Nashua, New Hampshire.