I’ve seen the term misused a lot recently, so I’ll state that a wet-bulb is a part of a measurement instrument. Wet-bulb temperature is a measured quantity (along with dry-bulb temperature, pressure etc.) and an Extreme wet-bulb temperature event is what actually kills people.

I know exactly how you feel :D Blackout curtains are indispensable imo. And thanks!

Correct for the most part. You can still have very high relative humidity with a low WBT if the dry-bulb temperature is equally low.

When the WBT gets above 35°C, it’s not only dangerous, but positively lethal when sustained for even the healthiest person as sweating (or any other form of evaporative cooling for that matter) can no longer keep the body at a suitable temperature.

WBT is also not to be confused with wet-bulb globe temperature (WBGT), which is an index for heat stress that also takes into account the effect of sunshine among other things. It’s much more situational and best suited to judge the heat stress of athletic outdoor activity in sunshine.

Altocumulus stratiformis perlucidus!

Altocumulus is most definitely high up there on my list of the best clouds for a sunset/sunrise, probably within the top two or three.

Yes.

I used my Sony RX10. These guys came surprisingly close, but still nowhere close enough to take such pictures on a phone. And thanks!

I’d wager that yes. The problem is that natural UV light is available only during daytime when visible light outshines its effects.

When shooting double exposure, one isn’t supposed to move the camera. The church tower should appear darker than the other buildings and definitely not translucent. My guess would be that this picture was taken through a window with the bright sunset behind the camera and reflected on the glass. Or then it really is just two completely different pictures stitched together. Wouldn’t call that a double exposure though…

I see. Thanks for the explanation.

I was thinking about HDR photography where you take multiple pictures of the same scene with different expoures and combine the best parts of each for a picture with a high dynamic range. This evidently wasn’t the case here.