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.
If there's a negative, it's with the vines potentially damaging already damaged/poorly executed masonry (0). Otherwise I can't see risk of fire being an issue unless your drought is so bad the vines wither, die and completely dry out near a spark source
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.