After a warm one on Thursday, on Friday it will become even muggier, with temperatures topping out near 90 degrees and it will stay that way right through the weekend, and the heat index or "feels like" temperature which combines the humidity with the temperature will be closer to 100. Each day will be partly sunny, but there is also the chance for some showers and possible thunderstorms during the day. The best chance for showers and thunderstorms will be late Saturday and Saturday night.
A cold front will come through late Sunday into Monday with more showers and thunderstorms, and that front will push out the heat and humidity away. We'll get back to more comfortable air into the middle of next week with a good deal of sunshine each day.
In the meantime, take it easy, stay close to an air conditioner or stay in the shade, and keep yourself well hydrated, and check on your elderly neighbors!