California June 15, 2021 6:57 am What Defines a Heat Wave? We often hear about “heat waves” in San Diego County but what, exactly, defines this weather pattern? NBC 7 meteorologist Dagmar Midcap explains. US & World Videos 2:27 San Diego firefighter hurt in crash en route to hurricane response released from hospital 2:50 San Diego heroes who rescued shark-attack victim to receive Carnegie Medals 2:26 San Diego weather today: Brooke Martell's forecast for Oct 1, 2024 2:32 Lawsuit alleges widespread child sexual abuse at county's Polinsky Center 44:51 Padres vs. Braves: Wild Card Preview with Kyle Glaser | On Friar Podcast