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Story summary
- Extreme heat warnings cover parts of Arizona, California, and Nevada, with temperatures reaching 110°F in places.
- The National Weather Service (NWS) advises residents to stay indoors and avoid strenuous activity during heat.
- Lake Mead National Recreation Area has closed hiking trails due to dangerous conditions.
- Meteorologists predict record-breaking temperatures, with highs 20–30 degrees above normal, affecting 70 million people as the heatwave continues through the weekend.
