Extreme Heat Waves: Causes, Dangers, and How to Stay Safe As global temperatures continue to rise, extreme heat waves have become more frequent, intense, and deadly. Once considered rare weather events, these prolonged periods of excessively hot weather are now a dangerous reality for millions around the world. Understanding the causes, the dangers they pose, and how to stay safe is crucial for everyone—especially the most vulnerable populations. What is an Extreme Heat Wave? An extreme heat wave is a prolonged period of excessively hot weather, which may be accompanied by high humidity. According to the National Weather Service (NWS) , a heat wave is typically defined as two or more days of temperatures above 90°F (32°C) or higher, depending on the regional average. But what makes a heat wave extreme ? Factors such as: Duration (lasting more than 3 days) Nighttime temperatures not cooling down High humidity levels Occurring in typically cooler regions all contribute ...
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