Major storms hit the east coast of Australia on Sunday 15 May and provoked technical failures of cloud-based computing systems. Major banks and card processors were hit with technical failures and both Eftpos and ATM networks suffered outages. Many shoppers were left unable to pay and took to socia media to complain about the inconvenience.
In the US, the FEMA recommendds including “cash or traveler’s checks and change” in an Emergency Supply Kit.
Further information is available here.