What is known about the Delta flight crash at Toronto International Airport?

An investigation is underway after a Delta flight from Minneapolis flipped upside down while landing at Toronto International Airport. All 80 passengers survived the incident that occurred yesterday afternoon, though some required medical attention for injuries. Toronto experienced unusually severe weather conditions prior to the crash, with over 20 inches (50 centimeters) of accumulated snow from two separate snowstorms between Thursday and Sunday - more snow than the entire previous winter. Despite these extreme conditions, airport officials have not yet attributed the crash to weather as the investigation is still ongoing.