A rainfall warning has been issued for eastern Vancouver Island, with up to 70 millimetres expected to fall on Friday.
In addition to heavy rain, Environment Canada is warning of winds up to 60 km/h coming from the southeast.
Special weather statements have also been issued for inland and western Vancouver Island.
The weather is the result of a “robust frontal system,” says Environment Canada. Rain is forecast to begin late overnight and intensify during the day before easing Friday night.
“Heavy downpours can cause flash floods and water pooling on roads. If visibility is reduced while driving, turn on your lights and maintain a safe following distance.”
Warnings have also be issued for much of the South Coast region of the mainland, with the Howe Sound and North Shore mountains expected to be especially hard hit.
That much rain could cause issues for anyone who hasn’t prepared for the rainy season, Environment Canada says. It suggests clearing leaves and debris from drainage areas to try to prevent local flooding.
The province is also warning residents in advance of the storm, reminding people to watch for falling trees, downed power lines and flooding, particularly near creek banks, which may erode quickly.
It says the River Forecast Centre is warning of high stream flow and the potential flooding for parts of Vancouver Island and the South Coast.