A team of nurses and physicians transfers a patient with covid-19 into an intensive care unit at St. Cloud Hospital in St. Cloud, Minn., on Nov. 23. (Jenn Ackerman/For the Washington Post)

GRAND RAPIDS, Mich. — At Spectrum Health, a major health-care system here, officials spent part of last week debating whether to move to “red status” in a show of how strained hospitals had become.

A flood of mostly unvaccinated covid-19 patients was arriving at emergency departments already packed with people suffering other medical issues, sending capacity to unprecedented levels. The only hesitation for Spectrum’s decision-makers? Data suggested the covid surge was not over.