What is one of the recommended shelters from a nuclear blast?

Deep foxholes are considered one of the recommended shelters from a nuclear blast due to their ability to provide substantial protection against the effects of such an explosion. When properly constructed, deep foxholes can shield individuals from radiation by utilizing the earth as a barrier. The thickness of the soil above the foxhole absorbs some of the radiation, and the surrounding dirt can also provide protection from the blast wave and thermal effects associated with a nuclear detonation.

In contrast, temporary tents and wooden structures do not offer adequate protection from radiation or the intense heat generated by a nuclear explosion. They lack the necessary mass and density to effectively shield against radioactive fallout. Open fields, while they may seem unobstructed for escape, provide no cover or protection from the effects of a nuclear blast, making them incredibly unsafe during such a scenario. Therefore, deep foxholes are the most effective option for shelter in this context.