1880: More than two dozen tornadoes were reported from Kansas and Arkansas to Wisconsin and Michigan. More than 150 persons were killed, including 99 people in Marshfield, Missouri.
The image above is downtown Marshfield, Missouri following the estimated F4 tornado. The image is courtesy of the Historical Society of Missouri.
Sources: Historic Weather Maps: Tornado Outbreak of April 18, 1880. History.com
1906: At 5:12 AM, a magnitude 7.8 earthquake hits San Francisco. A devastating fire soon broke out in the city and lasted for several days. About 3,000 people died, and over 80 percent of San Francisco was destroyed.
The burning of San Francisco, a view from St. Francis Hotel. The image is courtesy of the Library of Congress.
This photograph was taken by George Lawrence from a series of kites five weeks after the great earthquake. The view is looking over Nob Hill toward the business district.