An Extreme Heat Warning is in effect for primarily lower desert areas of South-Central AZ, including Phoenix, through Saturday. High and low temperatures will push the HeatRisk category up to high-end Moderate (Level 2 of 4) with areas of Major (Level 3 of 4). Phoenix will flirt with the record on Saturday, August 2nd with a forecast high of 114°F and a current record of 113°F (1918, 2009, 2011).