...Heat Wave Developing... A ridge of high pressure will build into the Tennessee valley and southern Appalachians through next week producing hot and muggy conditions. Highs will climb into the lower and middle 90s across much of the Tennessee valley during the week with some areas in the upper 90s by mid-week. The hot temperatures and humid airmass will produce heat indices in the mid to upper 90s Sunday and Monday, increasing to upper 90s to lower 100s for Tuesday and Wednesday, and possibly 105 degrees for the latter half of the week. For any outside activities, remember to stay hydrated, limit strenuous activities outside during the afternoon hours, wear light-weight and light-colored clothing. Know the signs of heat illness and practice heat safety. Check in on people without air conditioning, as well as any elderly relatives and neighbors. Never leave children or animals in an unattended vehicle, as car interiors can reach deadly temperatures in a matter of minutes. Visit https://www.weather.gov/safety/heat for more heat safety tips and resources.