Temperatures will gradually warm through the majority of the workweek, peaking at 6-10° above normal on Thursday. This will result in widespread Moderate HeatRisk with areas of Major HeatRisk on Thursday across the lower deserts. Additionally, Extreme Heat Watches are in effect across portions of the area Tuesday-Thursday. Dry conditions continue through Tuesday with increasing moisture leading to isolated/scattered thunderstorm activity across the AZ higher terrain for the middle to latter half of the week.