They have been refurbishing a substation so it's unavoidable. How long they last must obviously depend on the work. I do know about not opening fridges and freezers, but my market chiller is outside and in the afternoon, the sun beats down on one side. Yesterday was 30°C...
Anyhow, everything seems ok. Thank you for your concern!
Oh, and we live in a small village. No industry. And, I cook with gas!👍🤗