A fire at the Cleveland Clinic in Cleveland, Ohio kills 123.

A major structure fire occurred at the Cleveland Clinic in Cleveland, Ohio, United States, on May 15, 1929. Nitrocellulose X-ray film ignited in a basement storage room, emitting a poisonous yellowish-brown gas which spread throughout much of the Clinic and subsequently exploded several times. The fire claimed 123 lives including that of one of the Clinic's founders, Dr. John Phillips. Most of the deaths from the fire were due to toxic inhalation. Many were immediate; some were delayed by hours or even days. A policeman, Ernest Staab, rescued 21 victims from the fire, and left the scene, seemingly in good health. He later collapsed while working on his lawn, was hospitalized, but contrary to many contemporaneous newspaper articles survived and worked for the police department for another 25 years.