First step is to get rid of the excess water in the basement. Make sure your sump pump is working and is doing its job. If you do not have a sump pump, have one installed.
As cranky said, get a shop vac and get most of the water out.
Assuming it has stopped raining outside, open up the windows and get some fans going. This should dry out the place. Box fans should be around $25 each.
If I were you, I would keep a very close eye for mold. Has the insulation/drywall gotten wet, if so, I would recommend doing a preemptive strike on mold by replacing the parts that got wet.