Water leak from heater is dangerous — can electrify water. Locate source immediately. Fittings = easy fix. Tank = full replacement.
See if any of these signs match your device — each one increases the likelihood of this fault.
These are the causes we encounter while repairing Water heater leaking — ranked from most to least common.
Loose water inlet/outlet fittings
Pressure relief valve opening due to high pressure
Tank cracked from rust (terminal)
Anode rod corroded, leak from base
Heater element gasket cracked
Heat exchanger leak
Any of the following = a danger signal — call now and don't try to fix it yourself.
On-site diagnosis, clear pricing before any work, and a documented 6-month warranty.