Friday’s House Oversight Committee opened an investigation into AmazonThe company’s labor practices and requesting information about a fatal warehouse collapse in Illinois.

Rep. Carolyn Maloney of D-NY. and Reps. Alexandria Ocasio-Cortez and Cori Bush (D-Mo.) addressed a letter to Amazon CEO Andy Jassy on Thursday. They expressed concern about recent reports that Amazon could be putting workers’ health and safety at risk by forcing them to work in extreme weather, such as tornadoes or hurricanes.

Legislators requested documentation related to Amazon’s handling. a tragic warehouse collapseOne of Edwardsville’s warehouses. The warehouse was named DLI4, and a tornado struck it last December. It had 1.1 million square feet of space. Walls on both the sides fell 40ft high, with 11 inches thick, in the direction that the roof collapsed.

Six people were injured and six others died. Six workers were killed, including delivery drivers who arrived at the site just before the storm. They fled to the bathroom in the area that had been damaged by the storm and ran for their lives.

Workers near Edwardsville were affected by the disaster. told CNBCThese people felt Amazon did not have adequate safety protocols to deal with severe weather.

DLI4 employees claimed they had been threatened by their supervisors “with termination or other adverse effects” if their work was interrupted to find shelter. Larry Virden, one of the victims, reportedly text his girlfriend: “Amazon will’t allow us to leave,” according the report. New York Post.

Kelly Nantel from Amazon stated previously that they were looking at “every aspect” of the incident.

They expressed concerns about Amazon’s responses to extreme weather that affected warehouse workers in other areas, including the Edwardsville tragedy. They cited a dangerous heatwaveThe Pacific Northwest saw a record number of employees last year. claimed they toiledIn warehouses where temperatures reached 90 degrees Jassy had to reply by April 14, the legislators said.

According to the legislators, “This investigation will help inform legislative efforts in order to curb unfair labor practices. To strengthen workers protections and address the impact of climate change upon worker safety.”

Amazon representatives didn’t respond immediately to our request for comment.

WATCH: Six Amazon employees dead after tornado hits Illinois warehouse