Sometimes people try to explain the miracles in the Bible as mere natural occurrences:
"It may never rain cats and dogs, but fish, shells, and frogs have indeed fallen from the sky on rare occasions.
In 1984, live six-inch [15 centimeters] flounders (fish) fell on a London neighborhood. It is thought that a waterspout had lifted them to cloud level from the Thames River, then later dropped them several miles away. The fish were probably as surprised as the people who saw them fall.
More recently, the fishing port of Great Yarmouth in Norfolk, England experienced a shower of fish on August 6th, 2000.
Similar stories are told of remarkable "showers" from other locations near open water. In one memorable storm in England in 1844, people held out hats to catch dozens of falling frogs. Such small creatures, once airborne, might be carried aloft for an hour or more within the strong updrafts of a thunderstorm.
These stories remind us of the plague of frogs that occurred long ago in Egypt (Exodus 8). At that time, however, the frogs came onto the land from the rivers and ponds. This plague was much more extensive that a rare fall of frogs during a local storm."
(source: www.christiananswers.net/q-eden/ednks007.html)