DES MOINES, Iowa — The number of people treated for the coronavirus in Iowa hospitals continued to soar Monday, prompting doctors and hospital officials to warn their facilities and staff could be overwhelmed without serious efforts to curtail the virus spread.

Data from the Iowa Department of Public Health indicated 1,469 new confirmed cases and 17 additional deaths in the past 24 hours. That follows a weekend in which more than 2,800 new cases were reported each day.

The seven-day rolling average of the positivity rate in Iowa has risen over the past two weeks from 25.5% on Oct. 18 to 36.4% on Sunday, according to researchers at Johns Hopkins University. Iowa’s rate is now third in the nation, behind South Dakota and Wyoming.

All 99 Iowa counties have a positivity rate above 7.5% and 46 are above 15%, an indication that the virus is aggressively spreading statewide.