The Egyptians build pyramids
Did it put 63% of their nation into drought?^1^
The Babylonians build a tower.
Did it put 63% of their nation into drought?
The people of Peru drew the Nazca lines. (very drought related)
Was it drought related in the sense that it put 63% of their country into drought? Only asking because i don't know, so please elaborate on its relevance :)
The people of the Chaco Canyon built huge structures and a large civilization. Then had to abandon it all during a epic drought.
And that is what's going to happen to the USA.
^1^ If i use more-precise but less-snappy wording, consider this phrase "Did it put 63% of the territories in its nation into drought conditions." We can't know if exactly 63% of Egypt was suffering drought at once, it requires modern, fast and responsive datakeeping.