Hi lisantodd,
If you have a hot water heater leak, you need to stop the leak so water doesn't cause damage to the wood under the heater and in the basement.
To stop the leak you need to turn off the water heater (both LP and electric), let it cool, bypass it so that no more water goes in. Drain the water heater so water already in the tank doesn't continue to leak out. If you're not familiar with how to do this, we have it covered in detail in the
Water Heater Usage Guide.
You might want to take a closer look at the leak. It's possible it could be leaking from the outlet on top and dripping onto the lower fitting. The top outlet, which is where the hot water comes out, probably has a check valve. The plastic check valves have been known to crack over time. The result is a leak. Sometimes a little leak. Sometimes a big leak. The
Water Heater Troubleshooting Guide has detailed instructions on replacing this check valve if that's what the problem is.
With the water heater turned off and bypassed, and drained, you can still use cold water and all the other appliances in the RV. Btw, once the water heater is bypassed, there's no point in continuing to heat the water since it will stay in the water heater (except for where it's leaking).