Is there a way to stop a muck fire?

No, but you can slow it down with fire breaks and keeping the surrounding areas clear of dead brush, alert a local FD and let them handle the rest of the job. NEVER try to contain a muck fire alone. The cause of them is lightning storms, the lightning will strike the ground and cause the fire, but it strikes in a marsh type area, thus it being a muck fire, the muck underground is flammable, and it smolders. That's what causes the smoke in the air. Muck fires are DANGEROUS!