A landslide can be a natural calamity, or man-made disaster. If it is from the elements of nature, you are helpless to prevent it. You can only make some preparations to deal with the aftermath of a calamity. Keep a packed suitcase at home. This must contain your important documents, a change of clothes, bottled water, dry food, a torchlight, extra batteries, and whatever essential items you might need. (medicines & etc).
Meaning of dream:
Psychologically, you might have seen stimuli that suggest a landslide, or drastic event, that might happen. Although you can’t prevent a big scale event occurring, you can take some precautions and measures to cope with it.