Warmth or heat?

Both are correct.

What's the context?

AnonymousWhich is correct? I felt the warmth on my face. Thanks

I felt the heat / chill in the room. An definite article is needed.

I was in a room and all of a sudden I felt what I can only describe as a hot wind.

AnonymousI was in a room and all of a sudden I felt what I can only describe as a hot wind.

I was in a room. All of a sudden, I felt what I could only describe as a gust of hot wind.

For the same reason, we say " a breath of fresh air", but we can't say " a fresh air".

My dictionary says:

sirocco is:

http://www.macmillandictionary.com/search-thesaurus/british/direct/?q=a http://www.macmillandictionary.com/search-thesaurus/

AnonymousWhy is it ok for the dictionary to say "a hot wind"?

A hot wind is as natural as a hot stream of water coming out of the faucet.

Edit.
Perhaps I see what you're talking about.

The word "wind" carries two separate bits of technical information:
1. It's made of air.
2. It's moving.

So you don't have t

What I can offer you as answer is that wind is both countable and uncountable. But most of the time, its considered uncountable. Its literal meaning can only be extracted from the context in which it is used. From the above sentence, " a hot wind" meant a warm weather system or a trough of hot air current. But personally, I would be reluctant to use " a hot wind" because if this use

dimsumexpresswhat stops us to accept " A fog is hoving over the hill", which is incorrect.

I see nothing incorrect or unnatural about "A fog is hovering over the hill."

Regards, - A.

I know we often hear people say " one water, one coffee, and one beer " and etc, and they become acceptable in the contexts in which they are used. ButI think " a fog " is among the these uses. " Don't we say " a bank of fog is hovering over the City by the Bay tonight" ?

Indeed! But that doesn't make the other incorrect, does it? - A.