2003 Mazda 6 White Smoke

Hi,

The place that I live at had a storm pass through and it was real bad that it flooded where all the cars are parked and our cars were at least half way under water, because of how bad it was.

My car starts and I was low on Transmission fluid in general, but I filled it up. It did overflow a little bit.

But I turned on the car and there was white smoke coming out of the tail pipes.

I'm not sure what to do to help fix this problem. I need help. Thanks!