On September 26, 1950 the sun turned deep blue over Edinburgh. The phenomenon was so unnerving Scottish motorists pulled over to gape at the indigo light. U.S. President Truman had announced hydrogen bomb testing earlier that year; no one could be sure what the Soviets were up to. If atomic scientists unleashed the end of time, it was bound to change the colour of the sun.
The cause was not a physics experiment gone awry, but a forest fire in northwest Alberta – the Chinchaga Firestorm of 1950. It might rate among the great fires of all time but for its location; unlike the 1666 Fire of London or the blaze that razed Chicago in 1871, the Chinchaga fire raged far from any major city and merely captivated eyewitnesses over half the globe.



