When the squad gets called in the opening scene the dispatcher states the time as 9:31. When the squad pulls out of the station the shadow is to left of the vehicle, meaning the sun has to be on the right side of the vehicle. Since the station faces south, that would mean it is afternoon when the squad leaves the station, not 9:31 in the morning.
When the station gets called to the paint factory fire the shadows on the vehicles when they leave the station indicate it is afternoon. However it is night when they arrive at the fire, which would indicate that it took them many hours to get there.
Shadow of the camera visible on the stretcher as it is being wheeled from the ambulance at the stockbroker's office.