last nite we didnt have hot water for some reason, only cold.. then earlier today our water got shut off cuz the construction nearby hit a water pipe or something.. but now we got water back but it's only cold water... do u think this has anything to do w/ the water that's coming into the house? or would it only be a water heater problem, cuz we checked it and it's not making any sounds at all or warm at all so we dont think it's on?