[TheDon]

The flames also have made it harder to hide, they say, since hillsides that once concealed migrants under bushes have been burned bare, exposing hundreds of trails

The silver lining! Burning brush along the border should be a standard operating procedure!

[LNewman]

Have you seen this post Colonias fear NL fire[Mexican border arsonists]

Possibly these prospective "immigrant"/arsonists are taking their cue from the abandoned border fence on the California border.