Coast-to-coast heat settles in
A strong ridge of high pressure is driving a coast-to-coast heat wave, with temperatures well into the 90s and 100s across much of the country. The Southwest is bearing the worst of it—Phoenix, Las Vegas, and inland California cities are facing dangerously hot afternoon conditions with little overnight relief in urban areas.
Climate context: a pattern of extremes
The current heat wave follows a March 2026 Southwest US heat wave that Yale Climate Connections ranked among the six most astonishing weather events of the century. Climate scientists point to warming ocean temperatures and a slowing, wobbling jet stream as factors intensifying heat extremes. The warming trend increases both the frequency and severity of these events.
Wildfire danger rises with temperatures
Hot, dry, and windy conditions are elevating wildfire danger across California and the Southwest. Residents are being urged to stay hydrated, avoid outdoor activity during peak heat, and never leave children or pets in parked vehicles. The National Weather Service has issued heat advisories across multiple states, with the pattern expected to persist into late June.