They don't. Living wood is very very hard to ignite. It would need to dry for several months before it can sustain a fire without help. It's not like grass th

They don't. Living wood is very very hard to ignite. It would need to dry for several months before it can sustain a fire without help. It's not like grass that can dry completely (and the leaves are dead, but not the roots) and then can catch fire. With a vine if it's dead (and getting dryer) it's not coming back - so pull it off the house.