As dangerous heat blankets Canada with alerts remaining in effect across multiple provinces, a professor at the University of California, Berkeley, is warning that using fans during sweltering conditions may not be beneficial and could even be harmful.
Expert Advice on Fan Use During Heat Waves
Stefano Schiavon, a professor of architecture and civil engineering at UC Berkeley, explains that while fans can provide relief in moderate heat, they become counterproductive when temperatures soar above 35°C (95°F). “In extreme heat, fans can actually increase heat stress by blowing hot air onto the body, accelerating dehydration,” Schiavon said. He recommends relying on air conditioning or seeking cooler environments instead.
Current Heat Warnings Across Canada
Environment Canada has issued heat warnings for several regions, including Ontario, Quebec, and parts of the Prairies, with temperatures expected to reach the high 30s Celsius and humidex values making it feel even hotter. The warnings come as Canada Day celebrations saw record-breaking temperatures in some areas.
Health Risks and Precautions
Health officials urge residents to stay hydrated, avoid strenuous outdoor activities during peak heat, and check on vulnerable individuals such as the elderly and those with chronic conditions. Heat-related illnesses, including heat exhaustion and heat stroke, can be life-threatening. Schiavon’s research underscores the importance of evidence-based cooling strategies, noting that fans may give a false sense of safety.
