• Record-breaking heatwave hits Arizona's Yuma Desert, reaching 110°F (43°C), the highest March temperature ever recorded in the U.S.
• The National Weather Service attributes the extreme heat to a strong 'heat dome,' pushing temperatures 20–30°F above normal in the southwestern United States.
• Early-season heat and high tourism rates raise concerns, with warnings issued about heatstroke and dehydration; residents and tourists are advised to take precautions.