Flooded! Help!

I have a 1999 Chevy Malibu, 73,000mi, automatic, 2.4L engine. It rained exceptionally hard, and I turned down a very flooded street, and while trying to turn around and go back the other way, it died. It hasn't turned on since. All lights, radio etc are fine, it just won't turn over. The air filter was drenched when I took it out. Do I need a new engine, or, is it possible it's something else. Something easier to fix?