dennis landry and a few others came back a few weeks after the evacuation. >> we talked in august, and what changed since then? >> we have become aware that there's a lot more gas retain under the subdivision than previously thought. >> but that may change. lately, the ground has become unstable. >> microearthquakes, where before there were 10 or 15 noticed through the equipment. and several weeks ago, it got as high as 326 in a 24-hour period. >> reporter: because of the quakes, parts of the swamp have sunk more than 2 feet. texas brine, the mining company, which the state blames for the disaster, is out digging holes to release the gases. >> it has to get into the air before its ignitable. >> that's the real threat? >> yes >> reporter: in the meantime, computers are monitoring the gases 24-. half of the town has been brought out by texas brine. they are cutting the streets completely open. >> are you able to talk to us for five minutes? >> reporter: we tried to talk to a texas brine representative, it to get their take on the situation. >> reporter: texas brine officials seem to be u