A Weather Authority First Alert Action Day is staying in effect until 8 pm Sunday due the hot and humid weather. That is why it is very important to practice heat safety to prevent heat-related illnesses. Looking at our weekend setup, a ridge of high pressure will be keeping the Desert Southwest hot and trending several degrees above-average. This ridge of high pressure will stay in place toward the east, keeping the Desert Southwest hot and also filtering higher monsoonal moisture this weekend. Plus, we are in for slightly hotter temperatures this weekend and nearing record temperatures yet again.