So the average warning time of a tornado is around 9 minutes. https://www.usatoday.com/in-depth/news/nation/2021/06/16/tornado-warning-system-has-come-long-way

So the average warning time of a tornado is around 9 minutes. https://www.usatoday.com/in-depth/news/nation/2021/06/16/tornado-warning-system-has-come-long-way-but-could-better/5152104001/ https://www.usatoday.com/in-depth/news/nation/2021/06/16/tor... I suspect an even worse place to be during a tornado is a car on the road, which is where the workers would probably be if the employer sent them home. Some things just aren't preventable.