It may rain cats and dogs only metaphorically, but there have been numerous documented cases of frog and fish rainfall. Cases of such rainfalls, often associated in the popular mind with Biblical curses, have been reported frequently in modern times.
Here are some examples:
- In 1977, thousands of frogs fell from the sky in Brignoles, France.
- On June 7, 2005, thousands of frogs rained on Odzaci, a small town in northwestern Serbia.
- At the end of February 2010, residents of Lajamanu, a small Australian town, saw hundreds of spangled perch fall from the sky.
- The United Kingdom is especially prone to falling frogs, having experienced a number of episodes, the most recent being in Bromley, England.
Many scientists believe that tornadic waterspouts—tornadoes that form over land and travel over water—may be responsible for frog and fish rainfalls. Other scientists theorize that any unusually powerful updraft could lift small organisms or organic material into the sky during a storm. (An updraft is a wind current caused by warm air from high pressure areas near the earth rising into cooler, low-pressure areas in the atmosphere.)
Of course, if you're Stephen King, the frogs have teeth and appear in an annual rainfall to prey upon their skeptics... (See his short story “Rainy Season” in Nightmares and Dreamscapes.)
If you're interested in taking a look at frog and fish rainfall, there are numerous YouTube videos that you can google on this subject.