As the flames spread, the risk grew that even the barrels of powder rescued from the magazine would explode. Anderson ordered all but five thrown into the sea through the embrasures. He understood that this decision had broader consequences than simply helping preserve the safety of his garrison. The powder in the five remaining barrels would be consumed quickly, leaving the fort unable to fight. Without food and powder, they would need to surrender soon—unless the U.S. ships outside the bar managed to deliver the promised men and supplies.
