No one knows whether this collapse was man-made or a natural disaster. The survivors are racing against time, using whatever they can find. While digging, they call out, and hearing responses from inside instantly boosts everyone's morale.
However, the further west they go, the deeper the train cars are buried. At first, those dug out could crawl through gaps to get out, but eventually, as they dug, the soil above kept flowing downward. As more soil accumulated, the diggers became exhausted.
Although the situation inside is unknown, the iron skin of the train should at least prevent immediate loss of life, but the thinner air and dwindling food will inevitably take their toll over time.
Given the current situation, even if they wait for rescue, it won't be until at least tomorrow.
Either the rear train detects their plight, or the train fails to arrive on time, triggering an alarm. Regardless, those buried face more danger than they do.
