The industry position
Fire is one of the ways a large urban earthquake does its worst damage: ruptured gas lines, overturned appliances, and water mains too damaged to fight what starts. The Canadian answer to that risk usually sits in the base policy rather than the endorsement.
The Insurance Bureau of Canada states it plainly in its consumer guidance: earthquakes are not covered on a home policy, "damage from a fire or explosion caused by earth movement would be covered." TD Insurance says its base home policy covers fire, explosion and smoke following an earthquake. BCAA and CAA-Québec say the same for their customers.
That is the reason a household without the endorsement is not entirely exposed. If the quake knocks the house off its footing, that is an earthquake loss. If the quake ruptures a gas line and the house burns, that is, under most wordings, a fire loss.
Why "usually" is doing real work
Not every wording follows the pattern. The Wawanesa Homeowners Comprehensive Package, Form 1503, in the 2022 edition we reviewed, excludes loss "caused directly or indirectly by earthquake" and adds that the exclusion "applies whether or not there is another cause or occurrence (whether covered or not) that contributes concurrently or in any sequence." Neighbouring exclusions in the same form end with a sentence restoring cover for resulting damage from an insured peril. The earthquake clause does not.
We are not concluding that a Wawanesa policyholder has no fire cover after a quake. An earthquake endorsement, a later edition, or provincial statutory conditions could change the result, and only the insurer can confirm how it reads its own form. The point is narrower: "fire following is always covered" is an industry generalization, not a guarantee, and the only way to know is to ask.
There is a second wrinkle even where fire is covered. Square One's sample wording applies its earthquake deductible to loss "directly or indirectly resulting from Earthquake." Under that kind of wording, a fire after a quake could be paid subject to the earthquake deductible rather than the ordinary one. That is a very different cheque.