This site has argued that when global warming accelerates, it will be the main driver for the realization of a number of prophecies found in Revelation. One of these prophecies is found in Revelation 8:10-11:
And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters; And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter.
As atmospheric temperatures rise, so will the water temperature of lakes, rivers, and other sources of drinking water. Unfortunately, due to man’s activities, many of our lakes and rivers are filled with phosphates. The combination of this pollutant and heated water results in blooms of algae, many of which can be poisonous. We can see this phenomena even now during summer.
https://www.bloomberg.com/news/articles/2019-08-02/biggest-n-j-lake-has-been-mostly-closed-to-swimmers-this-summer
Blue green algae blooms can appear during the hot summer months, which can cause a number of problems, one of which is the water is no longer potable. As global warming worsens, we can expect these HABs (harmful algae blooms) to increase in frequency, duration, and magnitude. Revelation tells us that eventually one third of the world’s drinking supplies will be rendered poisonous, as global warming causes water temperatures to rise, sparking harmful algae blooms on a global level.
Hopefully the Rapture will occur before the Seventh Seal is opened. As the saying goes, God helps those who help themselves. Doesn’t hurt to at least make contingency plans.