Four things you need to know about Tuesday, August 26

Tuesday, August 26, 2014, 8:27 AM - Wondering what you missed overnight or what you can expect for the day ahead? 

Here's your weather briefing for Tuesday, August 26. 

1. All eyes on Cristobal

Cristobal moved away from the Bahamas after strengthening into a hurricane Monday, leaving a swath of soaked Caribbean islands and at least five fatalities in its wake.

Now, forecasters at the Canadian Hurricane Centre are keeping a close eye on potential impact in Atlantic Canada, particularly Newfoundland.

"This is a brief note about the current tropical storm northeast of the Bahamas - Cristobal - that may affect the Grand Banks later this week," the centre said in a statement early Tuesday. "It does not appear that the island portion of the province will be directly affected - however - that can certainly change. Computer models are predicting a possible interaction between the storm and a cold front which could complicate things."

Many computer models indicate Cristobal could track over the southern fringe of the Grand Banks on Friday, the centre adds.

2. Heat warning covers southern Ontario

"A hot and humid airmass will affect portions of southwestern Ontario and the Golden Horseshoe today," that's according to the heat warning issued by Environment Canada early Tuesday.

Humidex values near 40 are forecast for the afternoon with high temperatures of 30°C expected.

The high heat however, will be short lived as a cold front sweeping across the region will bring a return to seasonal temperature values for the remainder of the week.

Dog Days? More like Dog Day! #Toronto today 31C with 40 humidex. Tomorrow 24C. 21C Thurs. Possible #thunderstorms this evening.

— Chris Murphy TWN (@chris_m_twn) August 26, 2014

3. Severe thunderstorms possible in Ontario

In addition to the heat, potentially severe thunderstorms are forecast across parts of Ontario Tuesday.

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The thick humidity is a prime ingredient for the thunderstorms, which will be sparked by a cold front sweeping down from the northwest.

Weather Network meteorologist Matt Grinter says the primary threats from any severe storms that do spark up will be strong winds and large hail.

4. Wildfire danger continues in the north

Air quality advisories remain in place for parts of the Northwest Territories as wildfire smoke is creating a high health risk.

"Wildfire smoke continues to produce low visibilities and poor air quality over some communities closest to the fires around Great Slave Lake," the statement reads. "Individuals may experience symptoms such as increased coughing, throat irritation, headaches or shortness of breath."

Residents are being urged to reduce strenuous outdoors activities wherever possible until the air quality improves.

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