http://www.nhc.noaa.gov/HAW2/english...pply_kit.shtml

This has a good list of things you should prep in advance of a disaster/storm.
For animals that might overheat, you can dampen towels to drape over them, or over a cage, as long as it doesn't prevent air flow. "Swamp cooler" style cooling.
Have loads of water. You can fill a garbage can with clean water if you line it forst with a new garbage bag. Or just get new garbage bins that will be used only for water.