Communique set one offers the hypothesis [please] that they control weather rather imprecisely. That is, they create thermal differences in both the oceans [killing lots of fish and other flora fauna] and in the airs. A vague area can then be affected or predicted to receive precipitation or cloud cover [the original purpose of controlling the weather] and wind direction.
But geography defeats them, so they researched into plate tectonics with nuke blasts underground. The funny thing is, those who love God figured they could end famine by creating more farmland and instead threaten our very existence by destroying the marine ecosystem. We're hurting, folks, and it's a very urgent problem. Short term: increase land agriculture and fish farming to repopulate the oceans. Long term: ecosystems aren't fragile, but we need to nudge our marine ecosystems towards flora and fauna we can use. Time will tell.
