Actually the effect is over such a large area that inversion makes scents as an explanation. There simply isn't anything human that is likely to raise such a stink.
Somebody should check though to see if there was a Mexican Festival in the City attended by Sharpton and Nadler.
Maybe a combination of an inversion and a real skunk. Seems the gas "stink" to alert people to a gas leak is based on the very natural skunk. In the wild, a skunk can be smelled for miles - with in inversion, further. Just a guess...
LOL.....there was a bull riding show at Madison Square Garden yesterday. I believe WABC radio studios are above MSG.