Just remember, a laser by it's very nature would be easier to operate at higher outputs in the 'vacuum of space'. Coherent holds the original patent on what's known as the 'tulip resonator'. They figured out how to layer thin mirrored sections & utilize VSWR to autotune the power. They are literally the reason for 1000Watt Co2 lasers you could carry in a backpack if you so choose. I <3 their products.
You would still have to survive the intense heating, we've seen blacktop distorted, aluminum/magnesium wheels puddled, sheet metal distorted. From photographic evidence, your safest place would be in a treehouse since trees seem oddly immune to fires caused by 'climate change'.