Emergency medical technician Thomas Hoang, left, of Emergency Ambulance Service, and paramedic Trenton Amaro prepare to unload a COVID-19 pati…

Emergency medical technician Joshua Hammond, of Emergency Ambulance Service, prepares a gurney to transport a COVID-19 patient to an emergency…

Emergency medical technician Thomas Hoang, 29, of Emergency Ambulance Service, pushes a gurney into an emergency room to drop off a COVID-19 p…

Emergency medical technician Thomas Hoang, 29, of Emergency Ambulance Service, loads a patient into an ambulance in Placentia, Calif., Friday,…

Dispatch Supervisor Eileen Cegarra works in Care Ambulance Service's communication center in Santa Fe Springs, Calif., Saturday, Jan. 9, 2021.…

Dispatch Supervisor Erick Aguilar stands in front of a screen showing the map of Los Angeles County while working in Care Ambulance Service's …

Dispatcher Ashley Cortez responds to a call in Care Ambulance Service's communication center in Santa Fe Springs, Calif., Saturday, Jan. 9, 20…

Emergency medical technician Thomas Hoang, 29, of Emergency Ambulance Service, falls asleep in a recliner while on standby for a dispatch call…

Emergency medical technicians Thomas Hoang and Joshua Hammond, of Emergency Ambulance Service, transport a patient on a gurney in Placentia, C…

Emergency medical technician Joshua Hammond, 25, of Emergency Ambulance Service, drives an ambulance to his station in Placentia, Calif. Frida…