With forecasters expecting hot, humid weather to move into Maine on Thursday, the Department of Environmental Protection has issued an air quality alert.

Ground-level ozone concentrations will be climbing in Maine on Thursday and are expected to reach unhealthy levels, according to a news release from the Maine DEP.

Unhealthy levels are expected along the coast from Kittery through Acadia National Park, the release said.

At elevated ozone levels, children, healthy adults who exert themselves, and individuals suffering from a respiratory disease such as asthma, bronchitis or COPD can experience reduced lung function and irritation.

TV5's Todd Simcox says Thursday's weather will be hot and humid with highs around 90 degrees.