Another microwave story
In the 1970s we heard a story from our IBM engineer. Their computers at North Harbour would all crash at the same time every day to much puzzlement of the engineers.
It turned out that a Royal Navy radar establishment nearby was testing an experimental new radar, guess what, at the same time every day the machines were crashing. The engineer told how the microwaves were affecting the conductivity of the air allowing shorting to take place.
From what I heard, they had to install Faraday cages around the site to prevent the crashes.