The rain is expected to be so heavy in Metro Vancouver that Environment Canada has issued a warning about it.
The federal forecaster said those in the affected areas, which include Vancouver and the suburbs and part of the Sunshine Coast, will be hit by about 50 millimeters of rain in just a few hours.
In its rain warning, Environment Canada said heavy rain is expected from Tuesday evening and through Wednesday morning.
It rains heavily over a short period of time and flash floods are possible, the agency said, attributing the sudden soak to an “intense Pacific frontal system.”
Forecasts suggest that the rain will subside to scattered showers the next day, but the area is in store for even wetter weather.
Environment Canada’s current forecast is for it to rain every day until at least Monday, which is not unusual for this time of year in the region, where historically it rains about 68 percent of the time. .
Wednesday is expected to be 15C warmer than usual, but the temperature will return to the seasonal norm of 9 by Friday, according to forecasts.