In the 90's I took an environmental course in college. Basics; the earth is entering an ice age. The global warming that is happening due to human consupmtion is a blink in any cosmic lifetime. You, your children, your grandchildren; ectx5 (approx.) do not have to worry about an ELE. However; since then I have read that the global warming effect has not been something that can be accurately calculated. Nor can the pole-shift. Or sun activity. Science is based on accululated data and human speculation. Really who really knows? Though; at this time; no, you do not need to go to the cellar.