District trash and recycling crews will start their shifts an hour earlier at 6 a.m. Wednesday because of the predicted 90 degree-plus heat, the Department of Public Works announced Tuesday.

For the rest of the season, when the temperature rises to 90 degrees or the Metropolitan Washington Council of Governments declares “unhealthy air quality,” crews will get the early start, according to the news release. The early pickups will “avoid environmental issues” and ”protect the quality of their (workers) health,” according to the release.

“DPW will continue to monitor the weather throughout the week and make adjustments to the collection schedule as the weather dictates,” the news release said.