How fast should I call after a basement flood?

As soon as everyone is safe and photos are started. Mould risk and finish damage rise quickly after materials stay wet.

Can I stay in my house during a basement flood?

Often yes if living floors are dry and utilities are safe — but leave if there is electrical risk, sewage contamination, or structural concern.

2026-09-17 · Guardian Emergency Response

What to Do in the First Hour After a Basement Flood in Toronto

Quick answer

In the first hour after a Toronto basement flood: get people and pets to safety, cut power only if you can do it dry and safe, stop the water source if possible, photograph the damage, move what you can out of the water, then call a 24/7 restoration team for extraction before mould risk rises.

Basement floods are one of the most common emergency calls across the GTA. Storm backups, failed sump pumps, and burst supply lines all create the same problem: standing water that spreads into finishes, contents, and wall cavities within minutes.

Minute-by-minute priorities

People first — If water is near electrical panels, outlets, or appliances, keep everyone out of the water. Call 911 if anyone is in danger.
Stop the source when safe — Shut the main water valve for a burst pipe. For a sump or sewer issue, avoid opening cleanouts that can make backup worse.
Power decisions — Only flip breakers if you can reach the panel with dry footing. Never wade to a panel.
Document for insurance — Wide photos of each room, close-ups of the water line on walls, and a short video of the source if still visible.
Protect contents — Lift furniture onto blocks, move boxes and electronics upstairs if safe, hang wet curtains or textiles to air if you can.
Call restoration — Fans alone rarely dry cavities. Extraction and moisture mapping in the first hours reduce secondary damage.

What not to do

Do not run a shop vac on sewage or unknown backup water without protective gear and a plan for disposal.
Do not tear out all drywall before documentation and a moisture plan — insurers often want photos of the wet materials in place.
Do not assume the furnace, water heater, or electrical are safe to run while wet.

Toronto-specific notes

Older downtown homes, walk-outs, and low-lying neighbourhoods can see rapid stormwater entry. If municipal backup is involved, note the time, weather, and any city alerts — that context helps your insurer and can affect coverage discussions.

Need help now? Call Guardian Water damage service