 Heat-related illnesses are climbing. CBS's Elise Preston is in Los Angeles. In Scorching, California, first responders like Julie Whitney are working 72-hour shifts, dealing with a spike in calls for heat-related illnesses. Is there anything surprising to you about the heat this summer? I feel like it came on a lot faster. Paramedics warn the heat is so intense it only takes about 15 minutes outside before you could start to feel sick with dizziness, cramps, or nausea.