• Martinez Lake, Arizona, sets a new record for the highest March temperature in the U.S., reaching 110°F (43.3°C).
• The heatwave impacting the southwest, including Phoenix, San Diego, Los Angeles, Las Vegas, and San Francisco, is linked to climate change, making such events four times more likely.
• Residents are advised to take precautions against heat stroke and dehydration, with cooling centers opened to assist vulnerable populations during the heatwave.