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Morning briefing, Canada Day edition: Four things to know

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Daniel Martins
Digital Reporter

Tuesday, July 1, 2014, 6:01 AM -

STORM WATCH: Powerful storms are heading for Ontario and Quebec. If you live in those provinces, tune into the Weather Network on TV and upload YOUR photos and videos to our website here!

Powerful storms are taking aim at eastern Canada, while parts of the west are struggling to cope with the flooding caused by days of torrential rain.

Here's a coast-to-coast roundup of what's ahead.

Atlantic Canada

Heat warnings are in effect in New Brunswick, and Environment Canada is also warning people in Prince Edward Island and Nova Scotia of intense humidity and heat.

"It's very warm through the majority of Atlantic Canada today. Temperatures this afternoon could be feeling up to 40 degrees," Weather Network meteorologist Kelly Sonnenburg said early Sunday.

Canada's national hot spot on Monday was New Brunswick's Kouchibouguac National Park, and heat records were broken in several communities.

Newfoundland will see scattered showers today thanks to a passing trough, and there will be a risk for an isolated thunderstorm this afternoon through Labrador and northern parts of Newfoundland.

"Nova Scotia and New Brunswick also have a very slight risk for a rumble of thunder this afternoon with all the humidity and daytime heating," Sonnenburg says.

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Ontario and Quebec

We are in Storm Watch for a powerful system that could spark storms in Canada's most populous provinces.

"The severity of afternoon storms with the passing cold front wil be dependent on the system currently tracking through ahead of the front," Sonnenburg says. "If the system breaks up and weakens, daytime heating will allow for very severe storms to develop."

Although most of southern Ontario could see storms, Sonnenburg says Eastern Ontario, including Ottawa, is the most at risk.

EXPERT ANALYSIS The Weather Network's Chief Meteorologist Chris Scott outlines the details of a "nasty line of storms" racing towards southern Ontario and Quebec on Canada Day.

Severe thunderstorm watches were in effect in parts of southwestern Ontario overnight, although they were dropped as the sun began to rise.

A big factor in the severe weather over the past few days has been the intense heat and humidity. Heat warnings are in effect in eastern Ontario, while in the Golden Horseshoe, temperatures were at or near the 30 mark, feeling even warmer.

Prairie provinces

Although the bulk of the expected precipitation has fallen on Manitoba and Saskatchewan, people in those provinces are grappling with the after effects of days of downpours.

Flood risk remains high, and states of emergency are still in place in several communities.

"Showers will linger through the afternoon today before pushing east into the evening. High pressure will begin to dry out the Prairies," Sonnenburg says.

Temperatures in Manitoba are expected to be cooler today, while parts of northern Alberta and western Saskatchewan are on track or scattered thunderstorms.

British Columbia

The southern B.C. coast has a dry week ahead of them, Sonnenburg says, with Vancouver not forecasted to see showers until Friday evening, although moisture is pushing to the central and north coast.

The south coast and interior are in for warm temperatures, with humidex values making it feel like the low 30s in some areas, including Vancouver.

Wednesday will bring some thunderstorm risk through the interior.

With files from Kelly Sonnenburg

STORM WATCH: Four things to know about Ontario, Quebec's severe storms.
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