A heat dome is expected to bring extreme temperatures to the Southwest, affecting over 25 million Americans. The heat dome occurs when hot air is trapped over a specific region, causing temperatures to rise significantly. This phenomenon is currently settling around central California, southern Nevada, and western Arizona, with temperatures expected to be 20 degrees above normal. Las Vegas and Phoenix are forecasted to experience 111-degree heat, which is typically not seen until late summer. Parts of the Las Vegas metro are under a Level 4 heat advisory until Friday, warning of severe health impacts from prolonged exposure to extreme heat.
The triple-digit temperatures are expected to persist until Thursday, with Fresno, California also experiencing high heat levels by Friday. Despite the heat dome dissipating over the region, the extreme temperatures may continue through the weekend. Experts warn that the heat will also be present at night, eliminating the relief typically provided by cooler temperatures after sunset. Heat advisories have been issued for parts of Utah, New Mexico, and Texas, with residents advised to stay hydrated and avoid direct sunlight to prevent heat-related illnesses.
Concerns about the impact of the heatwave are heightened by the fact that more than 2,300 people died due to extreme heat effects in the US last summer, marking the highest number of such deaths in 45 years of record keeping. As a result, National Weather Service meteorologists are urging residents in affected areas to take precautions to protect themselves from the intense heat. The risk of heat-related illnesses and deaths rises with the persistence of high temperatures and the lack of relief at night, making it essential for individuals to remain vigilant and prioritize their health during this heatwave.
