If your water heater is leaking from the bottom, you must take immediate emergency action to protect your home. First, shut off the cold water inlet valve on top of the tank to stop incoming water pressure, and turn off the electrical circuit breaker or gas control valve. Place towels and buckets to catch pooling water. Inspect the base; if water is seeping directly from rusted bottom seams or tank walls, the tank has failed structurally and must be replaced, as internal bottom leaks cannot be repaired. Verification: Confirm the leak source is internal rather than condensation.
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