Megane II Electronic Fault... Help please :(

Hi All,

I am hoping someone can help.

while driving home last night in the rain and puddles, my megane started to flash warning signs service stop etc... and the headlights started to flash on and off and the indicators started to flash fast, the steering locked and there was a loss of power so i pulled over but car would not start, so after being towed home, with 3 irritated kids lol , the fusebox under the bonnet was checked and it was full of water, so thats been dried overnight and im hoping that should solve it, has anyone else had this problem that they have been able to fix it?, with 3 boys and just weeks from xmas im worried it will cost a fortune..

Thanks in Advance for any replies... <3