BALTIMORE, MD—The Maryland Department of the Environment has issued a Code Orange Air Quality Alert for Monday in Baltimore as summer heat looks to return to the region.

The National Weather Service says high temperatures on Monday will be in the mid-90s.

A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases, and the elderly.

The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors.