Years ago my sister and BIL flew into Atlanta from Seattle from an Alaskan cruise. Bad weather, overnight in the airport. No food, water, vending machines. No flights due to weather, tried to rent a car, no cars. Was in the airport almost 30 hours till first available flight. My sister had some crackers. No food place was to open for 12 hours. So many elderly sick from not eating/drinking. Food places closed early due to weather. I think they finally found a water fountain, but the line was sooooo long. Was to have a two hour layover, so thought they would eat then before their next flight.
We now always have something in our carry on. Not tons, but some crackers/cheese sticks/nuts/mints/gum.