The phrase "unless the emergency" is correct and usable in written English.
It can be used to indicate a condition that allows for an exception to a rule or situation, specifically in the context of emergencies.
Example: "You should not leave the building unless the emergency requires it."
Alternatives: "except in case of emergency" or "unless it's an emergency."
"Flood water can also be extremely dangerous, and people should not attempt to walk or drive through it unless instructed by the emergency services".
Hospital officials later went public with their problem, saying that unless the county emergency network could figure out how to place more burn victims in county hospital beds, the medical center would have to shut down the unit because it could no longer afford to care for so many uninsured patients.
Never leave the emergency room unless you know exactly what to do if you feel worse or develop new symptoms.
Yet the patient cannot leave the emergency room unless there is a bed available, the room is clean, the head nurse on the floor agrees to accept the patient and an orderly arrives to transport the patient.
In what is clearly intended to be a calming message, he asks that Londoners stay where they are, do not call the emergency services unless there is a life-threatening situation, and promises there will be more information.
A bill introduced Tuesday by Sen. Mike Lee (R-Utah) would automatically end presidential emergency declarations after 30 days unless Congress votes to extend the emergency.
Today Mother Jones published a piece entitled, "No, You Can't Just Go to the Emergency Room Unless You Want to Go Broke". And I suggest that everyone read it.
Undergraduates and junior doctors rarely had a systematic approach towards the breathless patient and tended, unless prompted, to focus on the emergency room situation rather than on patients with longer term causes of breathlessness.
