Responsible or panicked? Meet the people around the world already preparing for crisis

Dan C, a physiotherapist in Maryland, started his emergency supply after becoming a father. So far, he has spent about $6,000 (£4,470), storing it on shelves in his basement.

"It's part of my responsibility as a parent," says Dan, 38, who has two children under 10.

A few years ago his house was cut off during a "very cold" February and the family was without power for two days. Though he'd already started keeping supplies, "there were numerous gaps in what I had prepared for," he says.

Dan's stash now includes 150 gallons of water and several large water storage containers made of soft plastic, which can be filled and kept in the bath.