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 2:16 Local nonprofit serves San Diego seniors in need this Giving Tuesday 2:24 The coughing, sneezing, wheezing, sniffling season arrives in San Diego 3:12 Little Italy brings back annual tree-lighting ceremony 2:05 Salvation Army's Giving Tuesday event goes all week in Escondido 1:52 Astronomical high tides slam into San Diego County's coastline
