Environment Canada has issued weather advisories for East, West, and North Vancouver Island expected to remain in place through Friday.
Residents in northwestern Vancouver Island are in for a prolonged period of heavy rain starting Thursday and through Friday thanks to a pair of frontal waves that will make landfall in succession.
Rainfall amounts up to 90mm are expected near Port Alice.
On Friday morning, residents in western Vancouver Island near Zeballos and Tahsis will wake up to nearly 100 mm of rainfall with a further 20 to 30 mm expected during the day.
Rain will cease Friday evening as the weather system moves southwards away from the region.
People in these regions are warned to look out for flash floods and water pooling on roads a result of the heavy downpour.
An entirely different type of weather warning is in effect for the eastern Vancouver Island, from Courtenay to Campbell River and Nanoose Bay to Fanny Bay.
There, southeast winds of 50 to 70 km/h are expected to develop overnight on Thursday/Friday signalling the arrival of a strong cold front.
These winds are expected to ease up late Friday afternoon but in the meantime, residents are advised to be wary of objects being tossed loose by the wind.