The witnesses will "shut up the heavens so that it will not rain during the time they are prophesying". Based on this scripture, the two witnesses will stop all rain from falling throughout the entire world for 1260 days or 3 ½ years. This single event will not only negatively impact the environment, but will also increase world hunger, cause an increase in crime, crop failure, a reduction of drinkable water and more. The two witnesses will also be able to turn “waters to blood and to strike the earth with every kind of plague.” Their powers seem to be unlimited.