What is wrong with my Hyundai Accent 2010

What is your question?

I was driving on the highway during periods of heavy rain. The check battery light started flashing then the car just stopped. The car would not restart. I had the car towed home and the next day I tried giving the battery a boost. It sounded like it was going to start, but never does start up. It cranks, but doesn't start. I checked and the Fuel pump is working. What else can I check?