Water still running: shut the main if you know where it is. If you do not, say that when you leave the number.
Sewage inside the house: stop adding water. Do not pour drain chemicals into it. This site cannot send a truck.
No hot water, heater in a garage or attic: Valley heat cooks those heaters. That is a common pattern here — not a diagnosis of yours.
What this is, and what it is not
A burst, a wet spot you cannot find, a monsoon sewer backup, or a dead water heater. Slow mineral scale is on this page too, but it is not the same urgency as sewage or a pipe that is open.
Phoenix, Mesa, and Tempe are not the same utility. ZIP is how a person knows which house this is about. We are not assigning a plumber from this page. No price from this page.