Metro Vancouver weather is leaving little doubt summer is gone, with the issuing of a rainfall warning on the first full day of fall.
The alert says Vancouver, Burnaby, New Westminster, West Vancouver, North Vancouver, Coquitlam and Maple Ridge will be hit the hardest.
Howe Sound is also expected to receive heavy rain.
A vigorous front will produce heavy downpours over the South Coast on Wednesday and into the night, with rainfall amounts of 40-70 millimetres forecast by Thursday morning, according to Environment Canada.
The conditions mean there is a potential for flash floods, washouts near rivers, creeks and culverts, and pooling on roads.
CBC meteorologist Johanna Wagstaffe says the heavy rain will taper to showers in the afternoon, with the risk of an afternoon thunderstorm. The temperature is expected to hit a high of 17 C.
Wet and stormy conditions are expected to persist through the weekend.
Wagstaffe says Vancouver could receive over 100 millimetres of rain by the end of Sunday.