June 18, 2016 7:35 am AM Forecast: Heat Begins Today will start off mild but temperatures will jump to mark the beginning of a dangerous heatwave. The Shanna Mendiola has the forecast on Saturday, June 18, 2016. US & World Videos 3:43 Despite encampment's clearing, safety concerns linger at UCLA 3:09 USC updates graduation plans as protest continues 0:45 Lakers fire head coach Darvin Ham 1:04 Metro warns of possible delays due to sickout 0:31 Long spear found at murder scene in Santa Ana