About 100 years ago, on May 15, 1921, multiple fires broke out in electricity and telegraph control rooms in several parts of the world, including in the US and the UK. In New York City, it was from a switch-board at the Brewster station that quickly spread to destroy the whole building, and in Sweden, operators at Karlstad exchange first experienced equipment malfunction and faint smoke, then after a period of quiet the main fire started, leading to extensive equipment damage, studies say.
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