Cool Spell Ends, Heat and Storm Risk Return This Week

A significant shift in weather patterns is bringing a temporary break from recent heat across multiple regions this Monday, June 15, 2026, with conditions expected to become much hotter and potentially stormy later in the week.

In the Pikes Peak region of Colorado, Monday night is forecast to be mostly cloudy with a slight chance of a shower, leading into a much warmer Tuesday with highs near 90 degrees and elevated fire danger. Forecasters warn that Wednesday could be the hottest day of the year there, with temperatures reaching the upper 90s along the Interstate 25 corridor and triple digits on the Eastern Plains.

Meanwhile, areas in the Midwest and Mid-Atlantic are experiencing a pronounced cooldown. After a stretch of days with temperatures above 90 degrees, including a 100-degree reading last Friday in Washington, D.C., Monday and Tuesday offer sunny skies, lower humidity, and highs only in the 70s to low 80s. Overnight lows are dropping into the 50s and 60s, providing a comfortable respite.

This break is expected to be short-lived. A transition back to warmer, more humid air begins on Wednesday in many areas. For parts of the Midwest, Wednesday has been designated an alert...