SAN FRANCISCO, Agusan del Sur — Butuan City, the capital of Agusan del Norte, is battling a dual water crisis: the immediate threat of waterborne disease and the longer-term need to find an additional source as the city’s main water system struggles to to meet growing demand. Butuan Mayor Lawrence Fortun directed the City Health Board on Wednesday to provide barangays with guidelines to ensure proper cleaning of water-storage containers and safe…