The blast at the city's port -- which manages 60% of all imports for the country -- left Beirut's largest grain elevator severely damaged, along with a grain terminal.
According to S&P Global, the silos can hold a total of 120,000 metric tons of grain. They're made up of 48 big cells, with a capacity of 2,500 metric tons each, and 50 small cells that can hold 500 metric tons each.
Lebanon, which was already in the middle of a financial crisis, was struggling with a bread shortage and economic peril had ignited mass protests in recent months. Some 80% of the country's wheat supply is imported, according to the U.S. Agriculture Department.
Following the explosion, Lebanese Minister of Economy and Trade Raoul Nehme asserted that all of the wheat stored at the facility had been "contaminated" and could not be used.
On Wednesday, Nehme told Reuters that grain reserves now stand at "a bit less than a month."
Lebanese interior minister Mohamed Fehmi said the explosion appeared to be caused by stored ammonium nitrate, which is generally used for fertilizers. It was the most powerful explosion ever seen in the city.