Help the Composto family to rebuild

My sister, brother-in-law and their children live in Houston and their house is at leat 4-5 feet under water. I feel so helpless this far away and trying to think of any way to help them.  I cant imagine how their last 24 hours have been.   Every dollar would make a difference.  The list is so long that they will need to get done when they finally will be able to rebuild.  I know there are so many people wanting to do something.  I appraciate all the prayers for my family!