Today is the 125th anniversary of "the great flood of 1889" in Johnstown PA. From wiki
"It was the result of the catastrophic failure of the South Fork Dam situated on the Little Conemaugh River 14 miles upstream of the town of Johnstown, PA, made worse by several days of extremely heavy rainfall. The dam's failure unleashed a torrent of 20 million tons of water from the reservoir known as Lake Conemaugh. With a volumetric flow rate that temporarily equalled that of the Mississippi River, the flood killed 2,209 people and caused US$17 million of damage (the equivalent of about $425 million in 2012 dollars). It was the first major disaster relief effort handled by the new American Red Cross, led by Clara Barton. Support for victims came from all over the United States and 18 foreign countries..."
Picture of Main Street: