The Short Version
This claim is false. Every credible source — from USGS and NASA to CAL FIRE and the Bureau of Land Management — attributes U.S. wildfires to well-documented causes: lightning, human activities (campfires, powerline failures, arson, debris burning), and climate-driven conditions. Multiple independent fact-checkers investigated the directed-energy weapons narrative specifically and found zero supporting evidence. The only source lending any support merely republished unverified social media posts with no expert or physical corroboration.