I read it about 15-20 years ago. It’s a fictional disaster-thriller type book that involves a LNG (Liquid Natural Gas) tanker in New York harbor. I think the ships name was the Prometheus. Anyway, one of the LNG tanks ruptures, releasing a huge cloud of gas. The gas floats around New York for mych of the day freezing solid anyone who comes into contact with it. Does anyone have any idea what the title is or who the author is?
Oh! I read this one! Horrible, it was – the death scenes freaked me out.
I’m convinced it was The Night Manhattan Burned by Basil Jackson and it’s a bugger to find via Google:
http://www.google.co.uk/search?hl=en&q=The.Night.Manhattan.Burned&btnG=Google+Search
Thanks! I’ll check it out. 
I think you might be thinking of
A Deadly Frost , by Terrance Moan
Ballantine Books; ISBN: 0345289471; (November 1980)
The LNG, being heavier than air, slides down into the subway…
Fireboats keep pouring water on the leaking tanker, trying to minimize the spread of the LNG, but some of them drift too close…
People are trapped in various places by the rising tide of chilly death…
Then, of course, the gas finds an open flame…
It’s very well written, and I’m damn sure that “Terrance Moan” is a pen name for some pro, because it’s the only one I’ve seen under that name. Lots of haunting scenes, such as above. Looks like it goes for $1.99 in paperback on Amazon.com.
Rates a solid 9 on the 1-10 Hometownboy scale, meaning I’ve read it multiple times.
Bump
Just to make sure NutWrench gets a chance to see answer #2. It’s one of my favorites, and deserved a lot wider recognition, IMHO