Today I watched a YouTube video about flash-flooding at Nogales. There's a Nogales, Arizona and a Nogales, Mexico, and I believe they flow seamlessly together. Anyway, a few seconds into the video you can see where a river (not a large one) has swept away Trump's border wall and thrown its steel members about like matchsticks.

https://www.youtube.com/watch?v=wyNmQJJPHnM
"Look upon my works, ye mighty, and despair."