National Heat Awareness Day is observed annually on the last Friday of May in the United States, specifically aimed at raising awareness about the health dangers associated with extreme heat. This initiative is a collaborative effort by the Occupational Safety and Health Administration (OSHA) and the National Weather Service to inform workers, employers, and the general public about preventable heat-related illnesses and fatalities. The day serves as a reminder of the risks faced by outdoor workers, such as farmers and manual laborers, who are particularly vulnerable to conditions like heat exhaustion and heatstroke. Activities typically include spreading awareness about the importance of hydration and protective measures against heat-related health issues. The observance highlights the need for increased vigilance as heatwaves become more frequent due to climate change, emphasizing the importance of protecting at-risk populations, including children, the elderly, and individuals with chronic medical conditions.