if you use a quick drying hairspray (aka if it has alot of alcohol in it) and you have some extra time/someone to help you you can fan it with a magazine while you hold up what needs to dry lmao.. i was at a race track for a weekend and forgot my blowdryer like a dumbshit so me and my mom sat there and fanned my hair with magazines till it dried :P it sucked ass but hell, it worked!
I once had to get into my brothers car and turn up the heat all the way and point all the fans at my head when I broke my hairdryer. It worked very well