Question: when are ers the busiest?
Answer: The busiest times of day in the ER are between the hours of three and ten o'clock at night. While emergency rooms (ERs) are unpredictable, a general guide is to expect the busiest time to be around 6 p.m. As you might guess, 3 a.m. to 9 a.m. is typically quieter, but remember, in the ER you cannot predict waiting time.