5,000 evacuees able to go home 24 hours after evacuated because of acid rain . Police said a passenger in the truck was unhurt . Canadian driver unable to avoid hitting a deer , flipped tractor - trailer . Use of highly corrosive hydrofluoric acid fuel .
5,000 evacuees able to go home 24 hours after evacuated because of acid rain . Canadian driver unable to avoid hitting a deer , flipped tractor - trailer . Use of highly corrosive hydrofluoric acid fuel .