How to take care of wild orphaned bunnies ?

So i found these bunnies (one was dead) and it was by a construction site with a rag over it and they were in a hole that looked like the workers dug so i figured they had touched them and when i put the bunny laying outside the hole back in, my hand brushed over the other bunnies and they were FREEZING so i took them home and they're nice and warm with grass and such and i'm trying to warm up the runt bunny, but i can't take them to the vet right now (i live in a small town) so what do i do to take care of them for tonight ? please no nasty comments, i'm just trying to help these little guys. thanks.