That happened to me today cycling to David Lloyd at the Marina. Very strong head wind on the way out, then the f***** turned through 180 degrees on the way back !
I remember the hot summers when I lived in New York, even though everywhere was air conditioned they really were quite unpleasant - very high humidity and everywhere stank of dog piss. Throw in the smog / dust issues they have been experiencing recently (and will probably experience again) and...