The heat is coming back but so far the humidity is still comfortable.  That will change overnight as the humidity increases and tomorrow with west winds, more humidity and temperatures near 100, the Heat Index will be close to 105º.  Over the next few days a weak weather front to our north will be the focus for clusters of thunderstorms to develop and some of these will drift over us, some could even come through Friday night.  Very hard to predict the exact location and timing of these Mesoscale Convective Complexes that may develop.  Through the weekend hot and humid and the risk of a passing cluster of storms to bring some temporary relief, but only add to the humidity.