I have a small all-glass conservatory. It's essentially a greenhouse joined onto the side of the house, and it's getting remarkly hot in the current sunny weather (North London, UK).
When the doors/windows are fully closed, a metal digital thermometer has been just about hitting 60 degrees in the direct sun.
Even with 2 windows and the doors full open, the temperature is comfortably getting into the 40s. I have some tomato saplings, and I pushed a digital thermometer a few cm into the soil, and yesterday it peaked at 39 degrees (Celsius).
Is this too hot for plants in general?
What about tomatoes specifically?
Is there anything I can / should do (beyond keeping a careful eye on watering, obviously!)