Extreme heat returns to the area early next week. Daytime highs will jump into the mid-to-upper 90s on Monday and Tuesday, with heat index values likely to top 100 in the afternoon and evening hours, according to the National Weather Service. Above average conditions are also expected to last long term, as the average high in June is 82 degrees and average low is 60 — highs in the upper 80s and low 90s and overnight lows in the upper 60s and low 70s. Those who need to be outdoors early next week should stay hydrated and take frequent breaks in shade or air conditioning.