Around him were a couple hundred shoppers, some with only credit cards, trying to stock up during a statewide emergency. The power had been going on and off in this Austin suburb as cold weather overwhelmed the Texas grid. But no one told shoppers to put their items back if they couldn’t pay cash.

When Hennessy got to the cashier, he said, she just waved him on, thanked him and told him to drive home safely.

“And it hit us — like, wow, they’re just letting us walk out the door,” the 60-year-old man recounted. Ahead of him, shoppers were pushing carts piled high with diapers, milk, jumbo boxes of crackers — all free. He began to tear up.