More workers across a range of industries are going on strike, seeking pay raises to catch up to inflation while the tight labor market has taken away some of the risk of walking off the job.

In the past few weeks, thousands of teachers in Ohio and Washington, nursing-home workers in Pennsylvania and mental-health therapists in California have walked picket lines after contract negotiations broke down over wages and other issues. Other workers have held daylong walkouts as they try to unionize coffee shops, distribution centers and other workplaces.