A significant ammonia gas leak from a tanker truck in Weatherford, Oklahoma, has resulted in the hospitalization of dozens and the evacuation of hundreds of residents. Reports indicate that at least 36 people have been hospitalized, with several in critical condition. Local officials issued a shelter-in-place order, which has since been lifted as air quality was deemed safe. The U.S. Environmental Protection Agency has mobilized to assist with the situation. The lack of wind in the area has trapped the ammonia plume, exacerbating the health risks for those nearby.