2002 Honda Civic

Inside of car smells bad I check water level in radiator is
low.
check for leaks and under car there is a drain hose
were water in rust color is coming out
what is the hose for a heater drain?
hose is located front mid section under car. Were heater is above it. Just a hose sticking out not attache to nothing. Looks like a drain hose.
but lot of water is coming out of it. And I think thats were the smell is coming from.
what do you think that is. Crack core on car heater?

Thanks

RH