I guess you could use the word blistering to describe our weather this week - it's been around 36C/97F all week and more of this is expected for tomorrow (but we're not really complaining because we get almost those numbers, with a minus sign prefix, in wintertime).
I went out this evening to give our flowers a much-needed drink, and of course took out the camera since the sky was also looking interesting. And again I forgot to acclimatize the camera and lens. As I went to focus on an interesting thunderhead I noticed the problem. Despite wiping the lens a couple of times the fogginess persisted. Recalling a past experience I then focused on a vine climbing up a balcony support beside me and made the photo posted below. The outcome wasn't planned, but I'll take it.
(70-200mm f5.6 1/40 sec ISO200)