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Someone put up a tent on their balcony to escape their heat-trapping apartment during the night.
(discuss.tchncs.de)
Third extended heat wave within 6 weeks.
The previous one exceeded 40°C, and the buildings not yet had time to completely cool down from that one before the third wave hit.
I was considering putting up a tent in my garden myself, but as I own a ground floor flat, the indoor temperatures did, with the help of some additional cooling measures, thankfully not exceeded 27°C.
I've tried this many times over the years but when the walls are already heated up and the temperature outside stays high during the night it makes very little difference to confort levels. The heat just radiates from the walls and heats the inside air all night. Until I got proper air conditioning installed I just suffered during the summer.