When your house smells strongly of sewage, you must take immediate action to safeguard your health and property. Open all windows and doors for cross-ventilation, and evacuate the home if the gas odor is overpowering or causes physical symptoms like dizziness. Locate the source of the smell by checking for dry P-traps, overflowing floor drains, or leaking toilet wax rings. Call a licensed professional plumber immediately to inspect your plumbing system and repair any broken vapor barriers or cracked pipes. Verification: Verify that all drain traps contain standing water and test indoor air quality.
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