Typhoon Yolanda, internationally known as Haiyan, was one of the strongest storms ever recorded, with wind speeds of more than 300 kilometers per hour (km/h) and storm surges of over four meters. The typhoon made its first landfall in the Philippines on 8 November 2013 and crossed the central part of the country, severely affecting more than 170 cities and municipalities in 14 provinces across six regions found within a 100-kilometer (km) storm track. The typhoon caused widespread flooding and landslides, which brought about thousands of deaths and unprecedented damage to the affected areas. Although rescue and relief operations were underway by 9 November 2013, most places remained isolated and without aid for days due to impassable roads, widespread power outage, and damaged communication and transportation facilities. The extent of the devastation prompted President Benigno S. Aquino III to declare a state of national calamity through Proclamation No. 682 on 11 November 2013. All departments and other concerned government agencies initiated rescue, relief, rehabilitation, and recovery work in accordance with pertinent government operational plans and directives. Alongside government efforts, local and international organizations and volunteers came together to extend assistance to the survivors of Typhoon Yolanda and took part in what would be one of the greatest concerted relief and recovery efforts witnessed in recent history.