Tornado Twins
The Tornado Twins are superheroes in the DC Comics Universe. The twins are Don and Dawn Allen, the children of Barry Allen (the second Flash) and Iris West-Allen. They first appeared in Adventure Comics #373 (October 1968).
Fictional character biographies
Don and Dawn Allen
In their first appearance, the twins are 30th century descendents of Barry Allen. They temporarily gain super-speed powers during "Flash Day", a ceremony honoring their ancestors.
After the events of Crisis on Infinite Earths, the history of the DC Universe is changed. In this new continuity, Barry Allen briefly joins his wife Iris in the 30th century, where the two manage to conceive the twins. Before they are born, however, Allen is killed saving the remaining worlds from the Anti-Monitor. Don and Dawn are raised in an era of extreme xenophobia, where metahuman activity is unwelcome. Growing up hearing the stories of their heroic father from their mother the two twins, who have inherited their father's superspeed powers, operate as superheroes in secret. They disguise themselves by spinning rapidly, so that they resemble two tornadoes. During this era they meet a time-travelling Wally West, who inspires them to fight the 30th century's prejudice against metahumans.