An intense and dangerous heat wave has millions of Canadians in its grip again, after a day of sweltering temperatures sent people searching for whatever relief they could find. The oppressive conditions have settled over much of the country's centre, turning ordinary summer days into a health hazard and prompting authorities to issue urgent warnings across a wide stretch of provinces and territories as the worst of the heat set in.
Ontario has borne the brunt of the extreme temperatures. Readings soared into the high 30s in parts of the province and melted several records along the way, while in Toronto the humidity pushed the feels-like temperature into the 40s. The heat wave has been moving slowly from west to east over the past several days, spreading the discomfort gradually across the middle of the country as it advanced.
The reach of the warnings underscored how widespread the event has become. Environment Canada issued heat warnings for parts of the Northwest Territories, Manitoba, Ontario and Quebec, covering four provinces and one territory, and cautioned that the heat was not only extreme but genuinely dangerous. The strain was visible on infrastructure as well, with a handful of roads in Manitoba buckling under the relentless temperatures.
Officials were careful to place the heat in context while stressing its severity. July is traditionally the warmest month in Ontario, so hot weather at this time of year is not in itself unexpected. What has stood out, they said, is the stringing together of a number of consecutive days well above normal, a sustained stretch of heat rather than a single spike, which is what has made this episode so taxing for people and systems alike.
The longer-term picture is more troubling still. Environment Canada projects that 2026 will be one of the country's hottest years on record, part of a broader trend that scientists have been tracking with growing concern. Researchers point out that Canada is warming twice as fast as the global average, a pace of change they attribute largely to the burning of fossil fuels and one that makes heat waves like this both more frequent and more intense.
That reality has sharpened a political debate over energy. As Canada moves ahead with more pipeline projects to export oil, climate scientists have been putting extra pressure on those in power, arguing that the physics of a warming climate will not bend to political calculations. The Prime Minister has said the decisions being made now will secure the country's energy future, while acknowledging they come at a cost, and conceding that the changes will mean the country's emissions run higher over the next few years.
Experts warned against complacency by pointing overseas. In Europe, relentless heat waves this summer have been linked to thousands of deaths, a grim benchmark for what unchecked extreme heat can do in densely populated areas. A researcher who studies the connections between extreme heat and human health cautioned that Canada must not assume it is immune, warning that if the country keeps seeing more intense and longer-lasting heat waves in its cities, it could eventually face costs to human health similar to those already seen in Europe.