Understanding Extreme Heat Warnings Extreme heat events are becoming increasingly common worldwide, posing significant challenges to public health and safety. Recently, the India Meteorological Department (IMD) issued a red color warning for heat wave conditions in parts of India, while France experienced a deadly heat wave affecting 54 departments. Understanding these warnings and taking appropriate precautions is crucial for public safety. What Constitutes a Heat Wave? A heat wave is typically defined as a prolonged period of excessively hot weather, which may be accompanied by high humidity. The specific criteria for a heat wave can vary by region, but it generally involves temperatures significantly above the average for a particular area. In India, for example, a heat wave is declared when the maximum temperature exceeds 40°C in the plains and 30°C in hilly regions. Recognizing Heat Warnings and Alerts Weather agencies issue various levels of heat warnings to alert the public abou...