Schools August 21, 2024 7:51 am School zone safety improvements across Los Angeles Los Angeles Mayor Karen Bass will be unveiling a series of safety improvements for schools across the city. Lauren Coronado reports for the NBC4 News at 5 a.m. on Aug. 21, 2024. US & World Videos 0:45 Salmonella cases shut down restaurant in Valencia 1:34 Firefighters injured in Irvine crash were returning from battling Airport Fire 3:21 Eight firefighters injured after rollover crash in Irvine 4:03 Deadly explosions in Lebanon escalate tensions in the Middle East 2:41 West Hollywood valet attacker may be linked to more assaults