From www.wdwinfo.com

Seven Dwarfs Mine Train reopened to guests after fire
Nov 2, 2014

People on Facebook are reporting that the ride reopened to guests shortly after the incident. The Seven Dwarfs Mine Train at Disney's Magic Kingdom caught fire last night shortly after 10:00pm, presumably after a wayward spark from the fireworks blew that direction. The Reedy Creek Fire Department responded and put out the fire quickly; there were no injuries. The fire was on the outside of the structure and the train itself was not involved. The area was evacuated, but reports on social media say it was reopened around midnight. The park was open until 2:00am for Extra Magic Hours.