 It's a tropical feeling night out there with lows only dipping into the mid to upper 70s under mostly clear skies. The big heat returns on Tuesday. It will be partly cloudy with highs reaching the mid to upper 90s. The heat index likely to exceed 105. There will be a chance for some pop-up storms late in the day. Wednesday, partly cloudy with a better chance of scattered storms. Highs reach the mid 90s. I'm meteorologist Kat Campbell in the Weather Center.