Luke 4:25
But it is true when I tell you, [while] there were many widows [living] in Israel during the time of Elijah, when it did not rain for three and a half years, causing a great famine over the entire land,
Revelation 3:7
"And write [this] to the angel of the church at Philadelphia: These are the words of Him who is holy and true, [and] who possesses the key [i.e., the power and authority] of King David, [and] who opens [a door] which no one will close, and who closes one that no one will open:
Revelation 11:6
These witnesses have the authority to shut the sky up so that it does not rain during the time they are prophesying. And they have the authority to turn the waters into blood, and to strike the earth with every kind of plague whenever they want to.