Go beg (aka "petition") congress while they suck out all your rivers. Good luck with that.
Rivers are part of ecosystems. They aren't done. They'll return to landscapes when the correct natural laws are aligned with.
The Rio Grande, like many rivers, has long shown what happens when humans (and corporations) treat everything as fair game for extraction without balance or limits and without aligning with life supporting "laws". Extraction is the core "law" (meaning principle not "power over" structures) of both the humans living along this river and their governments. "Congress" is itself part of the extraction machinery.
Humans can choose to live differently if they want to.
Rivers will return.
But it's not humanity itself doing this. They want us convinced that it's exclusively our hands. "If humans would just wake up and realize all the damage they're causing, the loving aliens would take them in. Until then, may your children starve"
The bad aliens made you do it. Gotcha.
If Geoff Lawton can green a desert within two years, then there is absolutely no reason the rivers in Texas need to run dry.
Humans could stop extracting everything they can get out of the planet (and everything else). They could also do something besides lying around eating BBQ steak, stockpiling guns, and fantasizing about making militias during the engineered collapse when the "good ET's" swoop in to save them. The "bad ET's" aren't so powerful humans can do nothing.