A powerful storm system is set to sweep across the Northeast this week, bringing a rapid shift from unseasonably mild weather to colder and more hazardous winter conditions. Forecasters warn that rain, snow, gusty winds, and falling temperatures could disrupt travel across several states.

Thousands of nurses across New York City have walked off the job after contract negotiations with major hospital systems failed to reach an agreement. Nearly 15,000 nurses are participating in what is being described as one of the largest nursing strikes in the city’s history.