While the main heat wave really ramps up Friday, for most of Southern California, Sunday is expected to be the hottest day, with temperatures as high as 115 degrees. As KPCC’s Jackie Fortier reports, simple precautions can keep you safe. 

<p>While the main heat wave really ramps up Friday, for most of Southern California, Sunday is expected to be the hottest day, with temperatures as high as 115 degrees. As KPCC&rsquo;s Jackie Fortier reports, simple precautions can keep you safe.&nbsp;</p>