Help my KA!!!

Hello everyone - I wonder if you can help!?!? There was really bad stormy rain last night and this morning and now my car won't start. It just makes a strained noise and then the lights come on as if it has stalled! Do you reckon it has flooded and if so what do you recommend. I have left it for about an hour now - should I give it another go?? PLEASE HELP!!!!!!!!!!!!!!!!!!!!