a case for extra currency in case of a weather emergency ... my military service was from Feb 1970 to the end of the air war in Aug 73 with duty stations in Japan and the Philippines, and multiple TDY to Okinawa and Thailand...spending a lot of off duty time frequenting establishments that served adult beverages served by young female local nationals...to a person, all of the older bar girls wore what we called baht bracelets or "di di mao" (Vietnamese for to leave quickly) bracelets... the baht (Thai) bracelets were inscribed with the weight in grams of the gold that the charm contained...when they accrued a little more money they converted it to another gold charm... they carried their wealth with them, and if threatened, could flee at a moment's notice

faced with a situation with wide spread prolonged power outage as those reported in Puerto Rico, where ATMs, and credit card readers are not operable, coupled with reported runs on banks that could exhaust their cash reserves, you might want to evaluate the amount of currency you have on hand.., perhaps stashing an extra couple hundred in small bills might be a good idea during certain high threat seasons of the year...