Soaring cases of the coronavirus are forcing cities and states across the country to halt plans to restart their economies and even reimpose earlier limits on public life, increasing worries that premature reopenings could lead to a second round of closures.

In Texas, which reported a record high of more than 5,000 new cases on Tuesday, the governor told local officials they could restrict outdoor gatherings to 100 people and urged residents to stay home. Maine officials called off plans to allow bars to resume serving drinks inside on July 1. The governor of Kansas said rising cases showed that the state was “not ready” to continue easing restrictions. And in parts of central Idaho, where coronavirus cases have exploded in recent weeks, bars are shutting down and gatherings of more than 50 people are again outlawed.

“We may have let our guard down a little bit,” said Julie Gibbs, the health officer in Riley County, Kan., home to Kansas State University, where officials said they would tighten restrictions on large gatherings after the county’s total virus cases increased by 50 percent over the past week.