Revelation 11:5,6

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.

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 .

These are not ordinary men. If anyone tries to hurt them, fire will come out of their mouth and destroy their enemies. We do see the calling cards of Elijah and Moses with the ability to shut up heaven, smite the earth with plagues, turn water into blood and call down fire on their enemies. The witnesses themselves are given power to judge and to smite the earth with plagues as often as they wish.  The power given by God to these two witnessess to bring judgements themselves, gives further proof that these two beings lived in the presence of God. That fact alone seems to rule out any idea that the prophets are normal men born in contemporary times.

The passage on the surface would seem to indicate that it will not rain on the earth for 1,260 days but it is not likely to mean on all of the earth. Another passage in the Bible says there would always be seed time and harvest on the earth (Genesis 8:22). The passage could just mean it will not rain in the land (in Israel) for that period of time. I expect the prophets will be able to do anything they wish to any nation they wish but these judgments will be selective and probably not global, although there probably could be some correlation to the trumpet judgments. Power to judge the nations might be given to them to bring the Jews out of the nations that they now dwell in, like power was given to Moses to bring Israel out of Egypt with God's judgments.

The ministry of the two prophets in my opinion is the most understated event in Revelation by prophecy teachers. We hear much speculation about the Antichrist but prophecy experts say little about the power that these two prophets will have over the world for 1,260 days. Most experts just have them walking the Holy City quoting passages of scripture but the message given here is clear.  These two will bring great torment on the earth to those who will not obey God.  They  will be central world figures and the key focus of the world for 1,260 days.

We next will read about the world's gleeful reaction when a supernatural Beast comes out of the pit and kills them. The world will believe that they have been freed from the two prophets judgments and that their prophecy of a Jewish kingdom will not be fulfilled.