1. In 1937, the worst flood in Indiana history occurred on April 26. Over 400,000 people were affected, and damages exceeded $500 million.

2. On April 26, 2009, Indiana experienced an outbreak of severe storms that spawned 47 tornadoes, resulting in widespread damage and loss of life.

3. In 1978, on April 26th, the Indiana Supreme Court ruled that a state law prohibiting unmarried couples from adopting children was unconstitutional, paving the way for adoption by unmarried couples in the state.

4. On April 26, 1865, the Indiana legislature ratified the Thirteenth Amendment to the U.S. Constitution, which abolished slavery nationwide.

5. In 1994, on April 26th, the U.S. Fish and Wildlife Service designated the Indiana bat as an endangered species due to habitat loss and other threats to its survival.