A heat wave is expected in Southern California at the end of this week, but forecasters are not anticipating temperatures to break records. Temperatures will be about 15 degrees higher than average in the Antelope Valley, with highs in the mid-100s forecast for Lancaster and Palmdale. In downtown Los Angeles, temperatures are expected peak in the mid to upper 80s while coastal areas will reach the mid to upper 70s. In the San Fernando Valley, temperatures could reach up to 96 degrees on Thursday and 100 degrees on Friday.