Michael B. Thomas | Getty Images Six workers were killed. Many of the victims were delivery drivers, who entered the facility shortly before the storm hit and stormed into a bathroom in an area of the building that was hit by the storm. “This research will update legislative efforts to curb unfair work practices, enhance worker protection and address the effects of climate change on worker safety,” the lawmakers wrote. Nantel told CNBC in a statement Friday: “Our focus continues to be on supporting our employees and partners, families who have lost loved ones, the surrounding community and all those affected by the tornadoes. We will respond to this letter in due course. “