We dietitians take joy in communicating the results of ongoing research in the field of nutrition – the science of how substances in food interact with our health. But if you’ve ever lived through a major disaster, you know that food and water take on a much wider meaning during times of emergency. As I watched the immense hurricane devastation of the past weeks in the United States, my mind took me back to the aftermath of a powerful flood that came through our community many years ago.

A sudden wall of water had wiped out major bridges and filled many of our friends’ homes with four or more feet (1.2 or more metres) of mud and debris. When the water subsided, we spent the next several days helping neighbours literally pile into large heaps what was left of their homes.

One memory will never leave me. After several hours of working with other volunteers to help our friends salvage the remains of their flooded home, we sat on a curb outside to rest. As our weary eyes surveyed the wiped-out neighbourhood, we heard the sound of a vehicle in the distance.

Sure enough, around the corner came a white van headed our way. The driver stopped in front of the house, jumped out and came over to where we sat. “Would you all like some sandwiches?” he asked.

To this day, I have never tasted food or drink more fulfilling than what was offered at that moment. According to the US Federal Emergency Management Agency (Fema) and the American Red Cross, familiar foods during emergencies.