Large parts of Ontario, including Ottawa and Toronto, remain under cold weather warnings as a deep freeze continues to grip the province, bringing dangerously low temperatures and wind chills.
Weather officials said Arctic air has settled over the region, pushing overnight temperatures well below seasonal averages. Wind chill values have made conditions feel significantly colder, increasing the risk of frostbite and hypothermia, particularly for those exposed for extended periods.
In Ottawa, residents faced bitter morning conditions as temperatures dipped sharply, while Toronto also remained under warning despite some daytime relief. Authorities said vulnerable populations, including the elderly, people experiencing homelessness, and outdoor workers, are at heightened risk during the cold snap.
Municipalities have activated warming centres and urged residents to check on neighbours, limit time outdoors, and dress in layers if travel is necessary. Public health officials advised caution, noting that frostbite can occur within minutes in extreme wind chill conditions.
The cold has also affected transportation and infrastructure, with reports of vehicle issues, increased energy demand, and delays linked to freezing conditions. Utilities urged residents to conserve energy where possible as heating use surged across the province.
Forecasters said the deep freeze is expected to persist, though some moderation may arrive later in the week. Until then, residents are being warned to stay informed through weather updates and follow safety guidance as Ontario continues to endure one of its harshest cold spells of the season.