Heatwave intensifies this weekend

AUSTIN (KXAN) -- Following some brief relief with temperatures under 100°, temperatures rise again this weekend with the worst of the recent heatwave still to come.A Heat Advisory is in effect until 9 p.m. Saturday for dangerous heat index values, and this will no doubt be extended through the day Sunday.Heat Advisory in effect until 9 p.m. SaturdayThe ridge of high pressure that has brought abnormally hot temperatures to Texas and northern Mexico will begin to drift north this weekend. As i