By Steve Mertl, The Canadian Press

DUNCAN, B.C. - Dozens of homes have water "up to the doorknobs" and others are under evacuation alert after heavy rain combined with high tides to flood low-lying parts of Duncan, an hour's drive north of Victoria.

Water streamed around a network of dikes built since the 1960s, when flatlands in the city and surrounding communities were routinely inundated.

The municipality of North Cowichan, which includes Duncan and has more than 27,000 residents, declared a local state of emergency after water from the Cowichan and Koksilah rivers and several creeks spilled their banks Friday morning.

"There's been high tides in the ocean which has not allowed the rainwater to drain away fast enough," public information officer Mark Ruttan said.

"We've had a couple of schools that have closed for the day and we've had to evacuate people out of their homes. That'll be about 300 homes."

Ruttan said estimates put the number flooded homes at more than 50 in North Cowichan and more in Duncan itself.

"There's a number homes that were flooded up to the doorknobs," he said.

Most of the trouble is in the Somenos Marsh area.

"It was an area that flooded years ago quite often before they put in these larger dikes," said Ruttan.

The dikes themselves have not been breached but unfortunately there are gaps, he said.

"Part of the problem is these dikes don't all connect up so there are areas where the water's been able to get between them," said Ruttan. "It hasn't gone over the dikes; the water's gone around the dikes."

Some residents put on evacuation notice were already seeing flood waters, such as Blair Ramage.

"(It's) basically right out my door," said Ramage, who shares a home with his girlfriend just outside the evacuation zone. "I'm in probably two feet of water right now. The street out in front is shut right down."

Ramage said the pump in his crawl space is under water and useless, and his vehicle is also flooded.

"I've just got to wait it out," he said.

Cindy Jones said she could see a lake of flood water across from the travel agency she manages. The nearby elementary and junior high schools are protected by dikes but were closed Friday.

"The road coming into my office is full of water," she said. "It's bad.

"I've lived in the (Cowichan) valley all my life and every so many years we get like this. We haven't been this bad for a good couple of years."

Another longtime resident, retired woodworker Roger Stanyer, said the area's combination of low land, high tides and massive rainfall makes periodic flooding a fact of life.

"It's certainly higher than normal," he said. "But not as high as it has been in the past, quite a few times."

A reception centre was opened for evacuees at a local community centre. Manager John Elzinga said about 100 people had registered.

Water levels started dropping Friday afternoon but Ruttan said the evacuation order would remain in place and crews were sandbagging because more rain is forecast.

"It's a little dryer now but we're expecting some more rain and probably Sunday we'll dry out a bit," he said. "But the longer-range forecast is for more rain next week."