British Columbia

Torrential rain set to hit B.C.'s South Coast, prompting flood warnings

The B.C. government is urging South Coast residents to protect their homes from potential floods as heavy rain is on the way and will combine with melting snow to cause damage.

Up to 150 mm of rain possible on west Vancouver Island through Wednesday; rising temperatures melting snowpack

Relentless rain over British Columbia's South Coast this week has prompted flood advisories for the region including Vancouver Island and the Fraser Valley. (Darryl Dyck/The Canadian Press)

The latest atmospheric river to wash over British Columbia is expected to soak parts of the South Coast with as much as 150 millimetres of rain in a series of waves that Environment Canada says won't relent until Thursday.

Rainfall warnings are in place across the west coast of Vancouver Island and the inner South Coast, including Metro Vancouver and the Fraser Valley.

The storm's first torrent on Tuesday is expected to be followed by a second intense gush Wednesday and a final one early Thursday, says the weather office.

Forecasters warned warmer temperatures accompanying the storm could push freezing levels as high as 2,500 metres by Wednesday, melting mid-level snowpacks and swelling waterways.

Emergency Management B.C. is urging homeowners to prepare for potential floods by clearing storm drains, cleaning gutters and confirming where sandbags can be picked up from local governments.

WATCH | Amid more rain, B.C. bolsters flood protection: 

Efforts to shore up B.C. flood protection ahead of heavy rainfall

4 months ago
Duration 2:04
With another atmospheric river and torrential rainfall on the way, low-lying communities such as Richmond, B.C., are working to strengthen dykes and drainage systems to keep flood waters at bay.

High streamflow advisories have been posted across all of Vancouver Island and the South Coast.

On Tuesday, the province extended its flood-related state of emergency by a week. First declared in November, it was set to expire on Jan. 11 after being extended once. It will now last until the end of day on Jan. 18.

Travel advisories from the last storm event remain in place, with restricted travel on Highways 5 and 99 due to mudslide damage and washouts.

High avalanche risk

Meanwhile, Avalanche Canada raised the risk of a slide on Vancouver Island, South Coast and Sea-to-Sky mountains to high, meaning very dangerous avalanche conditions exist.

"Wait out this storm,'' said a post on the Avalanche Canada website, advising that travel on southern coastal mountains was not recommended until conditions improve.

"Expect loose, wet avalanches to be widespread at all elevations, and easily triggered,'' the site said.

The B.C. government has closed a section of Highway 1 in the Fraser Canyon due to avalanche risk. Travel is not permitted on this route, between Yale and Boston Bar, until further notice.

Although the city of Abbotsford, which was badly damaged during catastrophic flooding in November, was covered by rain warnings linked to the storm, forecasts show the region will likely dodge the worst of the downpours.

A man walks through rising flood waters in Abbotsford, B.C., on Nov. 28, after a series of atmospheric rivers contributed to severe flooding in the Fraser Valley. (Jonathan Hayward/The Canadian Press)

Environment Canada says that part of the Fraser Valley could see no more than 10 millimetres of rain Tuesday, up to 40 millimetres overnight and a maximum of 20 millimetres Wednesday.

Abbotsford remains under a state of emergency, which was declared as rivers rose amid torrential rain in mid-November, and the city has told residents in low-lying areas to prepare for the potential of localized flooding.

The provincial government has urged people living in flood zones to be prepared with a grab-and-go bag for each household member in case they are forced to evacuate

For the latest weather alerts, visit Environment Canada and for up-to-date road conditions provincewide, visit DriveBC.ca

With files from Akshay Kulkarni

Comments

To encourage thoughtful and respectful conversations, first and last names will appear with each submission to CBC/Radio-Canada's online communities (except in children and youth-oriented communities). Pseudonyms will no longer be permitted.

By submitting a comment, you accept that CBC has the right to reproduce and publish that comment in whole or in part, in any manner CBC chooses. Please note that CBC does not endorse the opinions expressed in comments. Comments on this story are moderated according to our Submission Guidelines. Comments are welcome while open. We reserve the right to close comments at any time.

Become a CBC Member

Join the conversation  Create account

Already have an account?

now