When the Vermilion Valley Resort in California’s eastern Sierra shut down for the winter, the staff left cabin doors unlocked just in case a wayward hiker needed shelter during the frequent mountain snowstorms.

Iran is being engulfed by mass unrest, triggering fears about Mr Sanchez’s fate after he stopped contacting his family in Spain on October 2, a day after he crossed the Iraq-Iran border.

A New York City man who needed to be rescued twice on consecutive days while hiking in a northern Arizona mountain range is urging others to pay more attention to winter weather than he did.