Global warming means thing will be getting worse. Of course it might be nice and cool for a bit, but slowly, these will get more common and much worse. For context, average global temperatures during an ice age are around 4° C colder than 1961-1997 average, and we are quicly going to supass 1° above.
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.
Used for humidity measuring instruments primarily, like a psychrometer.
Basically using a wick or wet material and forcing air over the sensor will evaporate the water and lower the temperature reading. Compared to a dry thermometer you can work out humidity.
A very high wet bulb temperature would mean very high humidity, which is dangerous for people as sweating is less effective.
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.
Are you in the UK? It’s 13C where I am at the moment but my partner and I went to watch the tennis last week and even with factor 50 on he suffered the worse sunburn I’ve ever seen irl. The extreme highs we’ve been experiencing over the last 5-10 years have made it difficult to remember that the average night time temperature in July in the UK is 11C. In June it’s 9C. It is much hotter than it should be.