B.C. Atmospheric River Drops 214 mm and Backs Sewers Into Basements: Sewer-Backup Coverage Is Optional on Most Policies

Owning the endorsement is not the end of it. The details on the declarations page decide how far it goes.

Start with your declarations page, the summary sheet at the front of your policy. Sewer backup and overland water will appear there as named endorsements if you have them. If they are not listed, assume you do not have them until your insurer or broker tells you otherwise.

Next, read the limit next to each endorsement. Sewer backup often has its own deductible and its own coverage limit, separate from the dwelling limit. An Ontario brokerage's guide to water coverages gives the example of a $25,000 sewer-backup limit. That figure may be all you get for the entire loss, even if your dwelling and contents limits are many times higher. Pumping, drying and disposal can use up a large share of a low sublimit before anyone gets to drywall, flooring or a furnace.

Then ask the timing question directly. The endorsement has to be on the policy before the loss. A Canadian insurance marketplace, PolicyMe, says plainly that you cannot add sewer-backup coverage after a backup has already happened. Insurers can also limit new water coverage once a storm is forecast. Some may still let you add it for the weekend, and some won't. One phone call settles it.

If your coverage questions go beyond this storm, the North Bay piece on sewer-backup sub-limit gaps goes through how low limits played out in real claims.

The goal is to reduce the water's routes into the house and cut the cost of anything that gets through. These steps come from IBC's Nov. 9 guidance and the River Forecast Centre's warnings. None of them guarantees a dry basement. Together they make one less likely.

Drainage, outside

• Clear the storm-sewer grate in front of your home and any catch basins near your driveway. The River Forecast Centre's warnings flag November leaves clogging storm drains as a specific urban drainage risk. Do this only in daylight and never in moving water.
• Clear eavestroughs, downspouts and window wells, but only from the ground or a stable position, not a ladder in high wind.
• Point downspouts and the sump discharge away from the foundation. The Intact Centre on Climate Adaptation says at least two metres. A discharge pipe that drops water beside the wall just sends it back to the pump.

Sump pump and power

• Pour a bucket of water into the sump pit and confirm the pump starts, runs and shuts off.
• Check the backup power source: a battery backup unit, a water-powered backup, or a plan for a generator that runs outdoors only. The storms have already cut power to close to 500,000 BC Hydro customers, and a pump without power does nothing.

Basement contents

• Move valuables, documents, photos and electronics to an upper floor, or at least off the floor into sealed plastic bins.
• Photograph the basement as it is now: finishes, furniture, the furnace and water heater. These "before" photos make a claim much easier to prove.
• Leave raising the furnace and water heater off the floor for later. IBC calls that a job for professionals, done well in advance, not a storm-weekend project.

Household water use

• During the heaviest rain, hold off on laundry, the dishwasher and long showers. When the sewer system is already overloaded, every litre you send down the drain adds to the backup. IBC lists this as a specific step to avoid overwhelming local water and sewer systems.

Barriers and a go-bag

• If flooding is imminent, use sandbags or flood shields at basement doors and windows. Pemberton is running a 24-hour self-serve sandbag station at Municipal Hall, 7400 Prospect Street.
• Pack medications, ID, your insurance policy number and the insurer's claims line in case you have to leave on short notice.

The earlier Homeowner.ca checklist for the B.C. coast covers the outdoor steps in more detail.

Safety first, then mitigation, then evidence. Do them in that order. Sewer water is not just a mess. It is a health hazard.

Safety. If water is near outlets or the electrical panel, do not wade in to shut off the power. Federal guidance from Public Safety Canada says that if the main power was not shut off before the flooding, you should not re-enter until a qualified electrician says it is safe. Health Canada treats sewage-contaminated water as a real risk of infection. Children, pregnant people and anyone with a respiratory condition should not handle it at all. Never run gasoline, propane or kerosene pumps or heaters indoors or in a poorly ventilated space, because carbon monoxide builds up quickly. Make sure a carbon monoxide alarm is working while the space dries.

Mitigation. Your policy requires you to take reasonable steps to stop further damage. That usually means pumping out, removing soaked materials and starting to dry. Health Canada's advice is to get things dry within 48 hours to limit mould. Keep every receipt for pumps, fans, dehumidifiers and emergency crews.

Evidence. IBC's claim-filing guidance gives the sequence:

• Report the loss to your insurer or broker as soon as you can, with complete and accurate details.
• Photograph and video the water line, the entry point (floor drain, toilet, window well, wall) and each damaged item before you move it.
• Keep damaged items unless they pose a health hazard, and check with the insurer before you throw anything out. Sewage-soaked materials may have to be bagged and tagged.
• Build a list of damaged items, with proofs of purchase, receipts, manuals and warranties where you have them.
• Keep notes of every call: date, name and what was said.
• If the insurer asks for a proof of loss, it is a sworn statement, and it is typically due within 30 days.

How the water got in is the single most useful thing to document. Whether the claim is handled as sewer backup, overland or groundwater depends on it.