Dangerous Heat Wave Forecast for Western and Central US, with Temperatures Up to 43°C (110°F)

The first widespread and significant heat wave of the summer is expected to develop across the Intermountain West and Plains, bringing widespread temperatures above 38°C (100°F) and isolated highs up to 43°C (110°F). The Weather Prediction Center (WPC) forecasts widespread Major (Level 3) to locally Extreme (Level 4) HeatRisk, with record triple-digit highs expected in several states including Nevada, Utah, Colorado, Wyoming, Idaho, Montana, North Dakota, and South Dakota.