Rain From Heaven
The term that we know as "heaven" is the Old-English translation of the two original words in the Bible - the Hebrew word in the Old Testament is pronounced shaw-may, and the Greek word in the New Testament is pronounced oo-ran-aws. Both mean the same thing - either the sky (i.e. the earth's atmosphere), or the limitless outer space above it, depending on what the writer was talking about at the time. Sky or space are quite accurate modern substitutes for heaven.
In the Bible, rain comes from the "heaven" that means the atmosphere. Obvious examples:
"11:11 But the land, whither ye go to possess it, is a land of hills and valleys, and drinketh water of the rain of heaven." (Deuteronomy 11:11 KJV)
"These have power to shut heaven, that it rain not in the days of their prophecy"
"8:1 And God remembered Noah, and every living thing, and all the cattle that was with him in the ark: and God made a wind to pass over the earth, and the waters asswaged; 8:2 The fountains also of the deep and the windows of heaven were stopped, and the rain from heaven was restrained; 8:3 And the waters returned from off the earth continually: and after the end of the hundred and fifty days the waters were abated. 8:4 And the ark rested in the seventh month, on the seventeenth day of the month, upon the mountains of Ararat [see Mount Ararat]." (Genesis 8:1-4 KJV)
Water was not the only "rain" that comes from heaven. The destruction of Sodom was accomplished when "the LORD rained upon Sodom and upon Gomorrah brimstone and fire from the LORD out of heaven" (see also The Day That Christ Incinerated Sodom).
"19:23 The sun was risen upon the earth when Lot entered into Zoar [see Who Saved Zoar?]. 19:24 Then the LORD rained upon Sodom and upon Gomorrah brimstone and fire from the LORD out of heaven; 19:25 And he overthrew those cities, and all the plain, and all the inhabitants of the cities, and that which grew upon the ground. 19:26 But his wife looked back from behind him, and she became a pillar of salt.
As well, sometimes both water and rain "rained" from heaven, as in the time of Moses and the Exodus (see also The New Exodus and Mount Sinai).
"9:22 And the LORD said unto Moses, Stretch forth thine hand toward heaven, that there may be hail in all the land of Egypt, upon man, and upon beast, and upon every herb of the field, throughout the land of Egypt. 9:23 And Moses stretched forth his rod toward heaven: and the LORD sent thunder and hail, and the fire ran along upon the ground; and the LORD rained hail upon the land of Egypt. 9:24 So there was hail, and fire mingled with the hail, very grievous, such as there was none like it in all the land of Egypt since it became a nation. 9:25 And the hail smote throughout all the land of Egypt all that was in the field, both man and beast; and the hail smote every herb of the field, and brake every tree of the field." (Exodus 9:22-25 KJV)
Another "rain" from heaven was manna, "I will rain bread from heaven for you" (see Christ The Bread of Life).
"16:4 Then said the LORD unto Moses [see also 'Before Abraham Was, I AM' and 'The Trysting Tent], Behold, I will rain bread from heaven for you; and the people shall go out and gather a certain rate every day, that I may prove them, whether they will walk in my law, or no. 16:5 And it shall come to pass, that on the sixth day they shall prepare that which they bring in; and it shall be twice as much as they gather daily." (Exodus 16:4-5 KJV)
The end-time two witnesses (see The Prophets: The Two Witnesses) will have similar, but far greater power than Moses and Aaron did, with "raining" both water and fire.
"11:3 And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth. 11:4 These are the two olive trees, and the two candlesticks standing before the God of the earth. 11:5 And if any man will hurt them, fire proceedeth out of their mouth, and devoureth their enemies: and if any man will hurt them, he must in this manner be killed. 11:6 These have power to shut heaven, that it rain not in the days of their prophecy: and have power over waters to turn them to blood, and to smite the earth with all plagues, as often as they will." (Revelation 11:3-6 KJV)
Fact Finder: Where did Elijah go when he went to "heaven"?