In a week of wet weather, the heaviest rains still have not fallen, according to Environment Canada.

The federal agency says the heaviest rainfall from the “prolonged atmospheric river event” in parts of Metro Vancouver, the Sea-to-Sky region and western Vancouver Island is expected Thursday night into Friday morning.

Those regions, including the North Shore, Coquitlam and Maple Ridge, as well as Howe Sound, Whistler, Pemberton and the Sea-to-Sky Highway, will see prolonged heavy rain, according to Environment Canada.

In areas with snow, the added rain could lead to the potential for flooding.

“Heavy rain will begin to taper off midday Friday as a cold front sweeps across the Lower Mainland,” Environment Canada said in its rainfall warning.

The agency warned that water will likely pool on roads and in low-lying areas and some travel delays are possible.

“Landslides may occur in vulnerable areas such as steep slopes, deforested areas or recent burn scars.”

Parts of Metro Vancouver could get up to 130 millimetres of rain by Friday, while the Sea-to-Sky region is expected to get up to 75 mm.

Western Vancouver Island, including Port Renfrew, Bamfield and Jordan River, could get up to 120 mm of rain by Friday.

The Fraser Valley could also see up to 120 mm of rain by Friday.

Flood watch advisories have been issued for parts of the South Coast, meaning river levels are rising and flooding of areas near affected rivers could occur, according to the province’s River Forecast Centre.

Evacuation orders, alert for Central Coast hamlet

A new evacuation order has been issued for a part of a small community on B.C.’s Central Coast as rain there increases the risk of landslides.

The Central Coast Regional District issued the order for part of Ocean Falls on Wednesday, “following significant flooding and heightened landslide risk,” instructing residents in the area to leave immediately.

There is also an existing evacuation order for the nearby hamlet of Martin Valley, two kilometres away from Ocean Falls, as well as an evacuation alert, which means residents must be ready to leave at a moment’s notice.

Evacuees can request support at the Old Bank Inn in Ocean Falls.

The remote coastal area is home to about 50 permanent residents, according to the regional district.

It’s located about 35 kilometres northeast of Bella Bella and is primarily accessible by boat or air.

The area above Martin Valley has a history of landslides, the regional district said in a news release, including ones in 1965, 2015 and 2025.