A&Es fear they'll be so stretched when pubs and bars reopen this weekend that tents are being erected outside buildings.
Lockdown rules are being relaxed across England on Saturday but hospital bosses expect A&E departments will be busy as a result.
Social distancing and queueing measures will still be in place to avoid packed waiting rooms and prevent the spread of COVID-19.
And Manchester Evening News says hospital chiefs have urged people to take care when enjoying booze over the weekend. In fact, the tents have been erected outdoors at Salford Royal, The Royal Oldham, and Fairfield General in Bury, which are across Greater Manchester.
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Dr Tom Leckie, consultant in emergency medicine at The Royal Oldham Hospital, said: "We are asking the public to think carefully before attending A&E this weekend and in the coming weeks.
"COVID-19 is still circulating in our communities and our hospital are continuing to care for sick patients both with COVID-19 and other emergency problems.
"We have already seen an increase in attendances prior to the easing of lockdown measures this weekend.
"We are expecting our service to remain busier than usual which may result in delays for you if your condition is not considered an emergency
"We will be prioritising treatment for those who are a genuine emergency case above those with minor conditions.
"We would encourage everyone to think which is the correct service for their needs and use 111, or other appropriate local health services, for advice before attending in all but emergency situations."
A suspected stroke, injury as a result a serious accident or a suspected heart attack are what the NHS classes as "a genuine emergency." The NHS says people must only visit A&E if they believe they are suffering one of these.
The two metre social distancing is still enforced at hospitals.
Face coverings and the use of hand sanitiser is compulsory for everyone visiting hospitals too.
Family members may not be able to attend with patients in A&E to limit the spread of infection.
Hospital chiefs say minor conditions can be treated at a local pharmacy, by a GP surgery and even an optician – if in doubt people can check by calling NHS 111 before coming to A&E.
The NHS 111 telephone advice service is available 24 hours a day, 365 days a year.
Calls to the service are free from landlines and mobile phones.