Doctors are warning some groups prone to air pollution to stay inside as smoke from dozens of fires on the West Coast can be seen more than 2,500 miles away in New Jersey.

There are hazy skies over the entire state, all thanks to smoke from the wildfires still burning.

Prolonged record-breaking heat and dry conditions are a recipe for fires. The Bootleg Fire, as it's known in Oregon, now encompasses more than 500 square miles, which is roughly the size of Monmouth County.

You won't smell any smoke because it's too high up in the sky and the atmosphere, but sensitive groups such as the elderly and young children, asthmatics, and lung patients may notice some difficulty breathing after strenuous activity.

“Younger children, people with seasonal allergies, pollen allergies, and elderly people with chronic lung disease such as COPD, we definitely see incidences asthma exacerbation when these air quality issues arise or the air pollution going up,” says Chirag Patel, allergist and immunologist with Ocean Allergy. “Same with COPD. We see more hospitalizations with those patients involved.”

The New Jersey Department of Environmental Protection has issued an air quality action day for Camden, Hunterdon, Mercer, Middlesex, Morris, Northwestern, Burlington, Somerset, Southeastern, Burlington, Sussex and Warren counties. The air quality alert is in effect until 12 a.m. Wednesday.