change state, turn - undergo a transformation or a change of position or action; "We turned from Socialism to Capitalism"; "The people turned against the President when he stole the election"

blow out - erupt in an uncontrolled manner; "The oil well blew out"

catch - start burning; "The fire caught"

light up - start to burn with a bright flame; "The coal in the BBQ grill finally lit up"

combust, burn - cause to burn or combust; "The sun burned off the fog"; "We combust coal and other fossil fuels"