The Lynchburg Fire Department responded to a fire at a business in Lynchburg after the welding arc set off a dust explosion. The fire department said workers were doing maintenance on top of an oven at Hanwha Azdel, welding a new rod, when the welding arc set off a dust explosion fire in the roof system in the insulation, activating the sprinkler system. Lynchburg Department of Emergency Services said the 2000 block of Enterprise Drive was shut down as a response. Fire crews say Unit 8 arrived and extinguished the flames. Lingering smoke on the roof was also extinguished. No one was injured.