"RAINING CATS AND DOGS"
Everyone's familiar with this expression.
Appropriate when it's raining hard.
(Like yesterday, in St. Louis.)
The expression is not attributed to any one person,
but is likely born in 17th/18th century England
when very heavy rains would occasionally
carry dead animals (dogs and cats)
through the filthy streets of London.
... thus causing the coining of this
now popular and colorful phrase.
(No animals floating down our streets,
but it sure has been raining hard!)