Well, my town is a notorious hot spot when it comes to heatwaves. Unofficially (we do not have an official station here for obvious UHI reasons), we equalled Gravesend temperatures (cannot remember the year) prior to that record being set. Tennis courts were melting etc.. but I was in Edinburgh at the time and never got to experience it.
This morning its 23C already! Personally, and willing-on a record break aside, high 30sC is just uncomfortable when so humid, and the plants certainly don't like temps in the 90s either