WEST ORANGE - Smoke billowing from the Wharton State Forest fire traveled across the state and into areas of New York City Monday morning.

An inversion in the atmosphere caused a cap of warm air that trapped the smoke.

For most, it's a nuisance, but it can be troublesome for those with respiratory conditions.

"It causes more airway inflammation, bronchial spasm and they end up having to more symptoms and having to be on more medication," says Dr. Karen Ziemke, an allergist.

Ziemke suggests those with asthma and other breathing problems should stay indoors or cover their mouths when going outside.

Afternoon rain cleared out much of the smoke and irritants in the air, but the season of forest and brush fires has officially begun in the Garden State.