Water heaters rarely die without warning. If you catch these signs, you can replace on your schedule — not at 6 AM on a Sunday.
The average residential water heater lasts 8–12 years. Yours is probably older than you think — check the manufacture date on the label. Once you're past 10 years, you're on borrowed time.
Sign one: rusty hot water. If you turn on the hot side and get discolored water while the cold runs clear, the anode rod is done and the tank is corroding from the inside. That's an end-of-life signal.
Sign two: rumbling or popping noises. That's the sound of sediment on the bottom of the tank being heated. Sediment insulates the burner from the water, drives up your energy bill, and eventually cracks the tank.
Sign three: moisture around the base. Small puddles, rust stains on the drain pan, or damp concrete underneath all suggest a slow leak from the tank itself. Fittings can be replaced; tanks can't.
Sign four: not enough hot water. If you used to get through everyone's morning shower and suddenly can't, either sediment is reducing usable capacity or a heating element has failed.
Sign five: age. A 12-year-old water heater doesn't owe you anything. Replacing it on your schedule — during business hours, with time to compare quotes — is always cheaper than replacing it in an emergency.
If you see one or more of these, get an assessment. Sometimes the fix is simple; sometimes it's time. Better to know now than at 6 AM on a Sunday.