What to Do When Your Sewer Backs Up in the Middle of the Night

A 2 a.m. sewer backup is one of the most stressful things a homeowner will ever face. The sound of water where it shouldn't be, the smell, the sinking feeling that it's getting worse by the minute — and a real question of what to actually do in the next ten minutes.

Here's the play, in order.

1. Stop using every water fixture in the house

Every toilet flush, every sink, every washing machine cycle adds water the system can't move. It all comes back up through the lowest opening — usually the basement floor drain or a downstairs tub.

2. Keep people and pets away

Raw sewage is biohazardous. Don't wade into standing water and don't let kids or pets near it. If it's spreading toward an electrical outlet, flip the breaker for that area.

3. Call a 24/7 drain professional

This is the call that ends the emergency. Mr. Drain dispatches around the clock — most overnight calls in Boston, Quincy, and the South Shore are dispatched as crews are available, with an arrival window given on the call.

4. Photograph everything before cleanup

For your insurance claim. Wide shots, close-ups, and any items that contacted contaminated water. Your technician can also provide written diagnosis documentation.

5. Don't try to "tough it out" until business hours

We hear this constantly: "I figured I'd wait and call in the morning." Six extra hours of standing sewage in the basement is the difference between a routine clearing and a $5,000 mold-remediation job. The after-hours service call is a fraction of that.

What we do when we arrive

Diagnose the cause (almost always a main-line blockage), clear the line with a heavy cable or hydro jetting, run a quick camera inspection to confirm the line is open, and give you written documentation for your insurance carrier. You'll know exactly what caused it and how to prevent the next one.