On May 26, 1917 hundreds of people in Illinois were killed by tornadoes.
27 May 1917, Page 1 – The Daily Review at Newspapers.com
“383 people were killed over an 8 day period between May 25th and June 1st (1917.) At least 73 tornadoes occurred across the Midwest and Southeast U.S. during this time, with 15 that were classified as violent (F4 or F5 strength).