Less than a day after the attack began, a sudden very heavy thunderstorm - possibly a hurricane - put out the fires. It also spun off a tornado that passed through the center of the capital, setting down on Constitution Avenue[34] lifting two cannons before dropping them several yards away and killing British troops and American civilians alike.[35] The storm spooked the British troops and forced them to return to their ships, many of which were badly damaged. The British occupation of Washington lasted only about 26 hours. Despite this, the "Storm that saved Washington" as it became known, did the opposite according to some. The rains sizzled and cracked the already charred walls of the White House and ripped away at structures the British had no plans to destroy (such as the Patent Office). The storm may have exacerbated an already dire situation for Washington DC.
An encounter was noted between Sir George Cockburn 10th Baronet and a female resident of Washington. "Dear God! Is this the weather to which you are accustomed to in this infernal country?" enquired the Admiral. "This is a special interposition of Providence to drive our enemies from our city,β the woman allegedly called out to Cockburn. "Not so, Madam," Cockburn retorted. βIt is rather to aid your enemies in the destruction of your city", before riding off on horseback.[36] Yet, the British left right after the storm completely unopposed by any American military forces.
The Royal Navy reported that in the attack, it lost one man killed and six wounded, of whom the fatality and three of the wounded were from the Corps of Colonial Marines.[37]
The destruction of the Capitol, including the Senate House and the House of Representatives, the Arsenal, Dockyard, Treasury, War Office, President's mansion, bridge over the Potomac, a frigate and a sloop together with all Materiel was estimated at Β£365,000.[12]:359
A separate British force captured Alexandria, on the south side of the Potomac River, while Ross's troops were leaving Washington. The mayor of Alexandria made a deal and the British refrained from burning the town.[38]
President Madison returned to Washington by September 1, on which date he issued a proclamation calling on citizens to defend the District of Columbia.[39] Congress returned and assembled in special session on September 19. Due to the destruction of the Capitol and other public buildings, they initially met in the Post and Patent Office building.[40]
Withdrew with good reason.
British=best. Duh!
https://www.youtube.com/watch?v=tN9EC3Gy6Nk