Health information website Index Santé reported the province's emergency departments stood at 147 per cent occupancy rate on average Wednesday afternoon.
The Health Department says people should stay home if they have a fever and is encouraging people to wear a mask if they have symptoms of a respiratory virus.
Last week the province's health minister asked Quebecers to avoid ERs, noting that a large percentage of people who go for a consult there don't have an urgent health problem.
Quebecers must be careful this holiday season as respiratory viruses are on the rise and emergency rooms grapple with overcrowding, health officials said Tuesday.