2005 Hyundai Accent Flood Damage

Engine Performance problem
2005 Hyundai Accent 4 cyl Manual 57,903 miles

My 2005 manual Hyundai Accent mileage: 57,903 suffered two different days of flood water. The water was high enough to reach the lower engine. After the second time I went out to start the car and the engine wouldn’t turn over. I also noticed that my radio stations had been unprogrammed. I thought it was the battery and got a jump start but not useful. I tried a second day and it still won’t start. I checked the oil and its fine. As I was waiting in my car I reprogrammed the radio stations. While listing to the radio I rolled down the window and the radio began making a wired sound like the speakers were going to blow out, although the sound was very low. I then went to start the car again and it still did not work and the radio stations became unprogrammed again. Could my car have suffered electrical damage?