Toxic cloud

Toxic clouds are dangerous clouds found throughout the Sierra Madre. Toxic clouds are the result of a high concentration of a matter called "The Cloud", which appeared over the Sierra Madre Casino during the Great War, preserving it whilst also turning its villagers into Ghost People. It is yet unknown why certain locations have high concentrations of The Cloud and how it came to existence.

These clouds are lethal to humans, whilst Ghouls are immune to it, probably because of their immunity to radiation. It is advised to avoid these clouds or only pass through them if necessary, as stimpaks are rare.

Tips

 * When having Dean Domino as a companion, his perk Unclean Living will protect you for several seconds and will also give a +25% protection against them.