for rv assistance in gulfport ms call Foley RV repair in gulfport.
HWY 49 GULFPORT MS
888-366-8276
As a quick fix place the hot water heater in the by-pass mode until you can get service. That way you can still use the toilet and sinks, you just wont have hot water. Be sure and shut off the electric and or propane to the hot water heater untill you get it serviced.
Good luck,
Also an RV traveler,
Jerry (MTN RIDER)