7 hours ago Researchers study how trees help offset high temperatures in San Diego San Diegans often look for shade during hot days, but is there enough of it in our most populated areas? NBC 7’s Brooke Martell reports. US & World Videos 0:41 Accused ‘Olympic athlete-turned-drug lord' busted for drug deal in San Diego in 2008 2:59 Having tried the carrot, MTS brings back the stick for fare-beaters 2:47 Second-grader found safe near Coronado Bridge after disappearing from school 2:25 Meet the Candidates: Oceanside Mayor 2:26 San Diego business owners feel toll of inflation ahead of November elections