Hot humid weather in New Jersey

Just started the lawn champion program with the rachio 3 controller. It’s been real hot and humid and a lot of my lawn appears to be dying. I’ve been good going with the flex daily and did apply the thrive about 4 weeks ago. I also treated my lawn with fungicide. I’m not sure if I should go back to Scott’s program and set up my own watering schedule. I do want to give this whole program time but I don’t want to loose my lawn . Anyone here have success with the flex daily and thrive in this heat? Thanks for any insight.