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 2:49 Health violations prompt Barrio Logan's Las Cuatro Milpas to temporarily close 2:45 New California law expands who can be placed in an involuntary hold 2:30 San Diego military community reacts to New Orleans, Vegas attackers serving in military 3:53 San Diegans welcome 2025 with celebrations across the county 2:22 San Diego has one of the highest inflation rates
