Women face disproportionate health risks during extreme heat, according to emerging evidence that challenges assumptions about universal heat vulnerability. Physiological differences explain part of the disparity. Women have higher body fat percentages and lower sweat rates compared to men, making temperature regulation harder during prolonged heat exposure. Their smaller body mass also means heat accumulates faster in their core.
The picture extends beyond biology. Pregnancy amplifies heat stress significantly. Pregnant women face increased miscarriage risk and premature labor during heatwaves, with some studies linking extreme temperatures to adverse birth outcomes. Hormonal fluctuations during menstruation and menopause also affect thermoregulation, leaving women more vulnerable to heat-related illness.
Social and economic factors compound these risks. Women perform more unpaid care work, often outdoors in developing nations where air conditioning remains scarce. In some regions, cultural clothing requirements trap additional heat against the body. Lower wages mean fewer women can afford cooling solutions like fans or air conditioning. Older women living alone face isolation that prevents adequate heat-related care access.
Healthcare systems haven't caught up. Most heat-illness research centers on male physiology, creating blind spots in clinical guidance. Heat exhaustion and heat stroke present differently in women, yet hospitals often apply one-size-fits-all protocols designed around male baselines.
Climate change intensifies the problem. Heatwaves grow longer, more frequent, and more intense. Public health campaigns about heat rarely address women-specific vulnerabilities. Cities designing cooling centers sometimes fail to account for women's safety concerns or childcare needs.
Researchers call for gender-specific heat preparedness strategies. Targeted public health messaging, improved air quality in women-dominated workplaces, and updated clinical training could reduce preventable deaths. Heat vulnerability isn't inevitable. Recognition of biological and social realities creates room for intervention.