One of these events occurred in Boston after the temperature suddenly increased from 0 to 40 degrees Fahrenheit, causing a molasses tank to explode. In response to another of these occurrences, angry citizens unsuccessfully sued the South Fork Fishing and Hunting Club. During that event, Clara Barton oversaw the first major relief efforts of the American Red Cross. One of 
One of these events occurred in Boston after the temperature suddenly increased from 0 to 40 degrees Fahrenheit, causing a molasses tank to explode. In response to another of these occurrences, angry citizens unsuccessfully sued the South Fork Fishing and Hunting Club. During that event, Clara Barton oversaw the first major relief efforts of the American Red Cross. One of these destroyed Johnstown, Pennsylvania in 1889. For 10 points, name these disasters that often occur when dams are overrun.
One of these events occurred in Boston after the temperature suddenly increased from 0 to 40 degrees Fahrenheit, causing a molasses tank to explode.
{floods} [accept {molasses flood} before "{South Fork}" is read]