The health advisory, impacting the five boroughs, all of Long Island and Westchester and Rockland Counties, will remain in effect for the rest of Thursday.

New York City, Long Island, and parts of the lower Hudson Valley are under an air quality alert as the New Jersey wildfire grows to 13,250 acres.

A fast-moving wildfire engulfing part of New Jersey’s Pine Barrens was expected grow Thursday, with smoke affecting the air quality in the New York City area before rain arrives this week, authorities said.