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 1:30 Why does San Diego County get Santa Ana winds? A meteorologist explains 2:30 San Diego County school districts preparing for outcome of school bond measures 2:24 San Diegans react to outcome of 2024 presidential race 2:11 San Diegans weigh in on sales tax increase proposals as Measures G, E on track to fail 2:13 San Diegans react to Todd Gloria's lead in mayoral race
