North American health agencies issue heat‑illness warnings as temperatures soar

Health officials in Canada and the United States are warning residents about the dangers of extreme heat. The Simcoe Muskoka District Health Unit in Ontario advises people to seek cool indoor spaces, stay hydrated, avoid strenuous activity during the hottest parts of the day, and check on vulnerable neighbours. It highlights symptoms of heat‑related illness and urges immediate medical attention for severe cases such as heat stroke.

In the United States, the National Weather Service and the Centers for Disease Control and Prevention have released a national heat‑risk forecast that maps current and projected extreme‑heat conditions across more than 800 cities. The forecast flags areas where heat advisories, warnings or record‑breaking temperatures are expected, affecting tens of millions of Americans each summer.