evidence: Social media is rife with images of empty supermarket aisles and signs explaining the lack of available food and other items. Stores such as Aldi have apologized to customers for the shortages. [...] "We're really seeing the perfect storm," Phil Lempert, editor of the website SupermarketGuru.com, told NPR. [...] "As a result of that, a lot of people said, 'Hey, I don't need this,' and they've left their jobs in the supermarket," Lempert said.