Four things you need to know about Monday

Monday, June 30, 2014, 7:05 AM - Wondering what you missed overnight or what you can expect for the day ahead? 

Here's your weather briefing for Monday, June 30. 

1. Severe thunderstorm risk in Ontario

Whether it's an extended long weekend or the start to your work week, unsettled conditions are expected across much of Ontario on Monday.

A severe thunderstorm watch was issued for parts of northern Ontario early Monday as "conditions are favourable for the development of severe thunderstorms."

EXTENDED ACTIVE WEATHER COVERAGE: Tune in to The Weather Network for live updates on the summer storms in your area. Our team of reporters and meteorologists in the field provide you with the most accurate and up-to-date coverage.

Strong wind gusts are possible along with large hail.

The thunderstorm threat will sink south throughout the day, but the better chance for more severe storms in southern Ontario will be on Canada Day Tuesday.

Much of the province can expect daytime highs near 30°C on Monday, feeling closer to 40 with the humidex.

2. Potent Canada Day storms expected in Ontario

All eyes are now focused on a cold front that's set to make its way into the region on Canada Day.

"The impeding cold front will trigger severe weather for southern Ontario and southern Quebec Tuesday," says Weather Network meteorologist Brian Dillon. "These thunderstorms have the potential to produce torrential downpours and gusty winds."

Be sure to check back as our meteorologists are keeping an eye on the exact timing and severity of this system.

3. Prairies face flood emergency

A large and intense low pressure system has brought between 100-200 mm of rain across parts of the Prairies since Friday morning.

That has resulted in numerous evacuations and local states of emergencies across Saskatchewan and Manitoba.

TUNE IN: Watch the Weather Network on TV for regular updates on this massive rain system, and send us your pictures and videos.

Regina's fire department tweeted Sunday night that the sewage system was working at full capacity, and that residents should delay showers, baths, and even flushing toilets to prevent additional strain on the system.

One of the main arteries to Mosaic Stadium in Regina. And right now there are three cars under water @sportscage pic.twitter.com/sLfD5w88gW

— Devin Heroux (@Devin_Heroux) June 29, 2014

"Rain continues over the hardest hit areas with another 15 mm or so expected today," said Environment Canada in a rainfall warning issued early Monday. "The rain should taper off later this afternoon with only slight accumulations into the overnight period."

Residents are being urged to watch for possible washouts near rivers, creeks and culverts.

4. Your Dramatic Photos: Prairie Storms

We've put together this selection of the best shots on social media.