Ajax, ON Current Weather

How long will it last? Minimal improvement in Ontario's air quality Thursday

Air quality in Thunder Bay twice as bad as Toronto on Thursday

Massive asteroid flyby of Earth will be visible to billions of people. Here's when

Flames engulf halted Ontario train with workers inside

Critical weather satellite returning to duty after major malfunction

At what air quality index level should you stay indoors?

Latest El Niño update shows stunning growth

DIY: Make a wildfire smoke filter with these simple steps

Ontario's AQHI is soaring. Here's what the numbers mean

What happens when Arctic sea ice disappears?

CN workers in viral video of wildfire train cab got out safely, railway says

Not just air quality, wildfire smoke impacts water, too

Feral hogs could complicate issues to contain invasive, flesh-eating parasite

Toronto shocked by pale, orange sky as smoke invades the city

Experts are warning Canadians that another tickborne illness is on the rise

This familiar but invasive plant can take over in the heat

PHOTOS: Blanket of wildfire smoke creates eerie skies across Canada

Tick bite sends Canadian to the ER, but not for Lyme disease

Five years gone: July 15 marks day of Barrie's destructive 2021 tornado

Looking back at the 2021 Barrie tornado with firsthand accounts

How to stay safe from the triple threat of wildfires, smoke and extreme heat

Weird 'space balls' found washed up on a beach, what are they?

Is Canada baking? Here's what the latest drought analysis says

Can you blame the heat for slow internet?

Beating the heat with a fan? It may not be as effective as you think

The do's and don'ts of having a rain barrel

'Pure excitement': Islanders describe spotting tornado off coast of P.E.I.

Rare EF-0 captured on camera on Prince Edward Island

Arctic Sea Ice Day: 5 facts about an at-risk, valuable climate asset

Mushrooms in your lawn? What it means and what to do