1993年了月9日至8月４日，我区连降暴雨，全区百万亩良田受淹，700多个村庄被大水围困，坑、塘、沟、渠大量积水，粪坑、猪圈污水面积增加，形成蚊虫孳生场所多、面积大、密度高、上升快、延续时间长等特点，一旦有传染源存在，蚊传疾病有潜在暴发流行趋势，直接威胁灾区群众生 From January 9 to August 4, 1993, heavy rains continued in my area. One million mu of fertile land in the district was submerged. More than 700 villages were besieged by floodwaters. Large amounts of water accumulated in pit, pond, ditch and canal, The area of ​​the polluted water increases, forming a large number of mosquito breeding places, large area, high density, rapid rise, long duration and other characteristics, once there is a source of infection, mosquito-borne diseases have a potential outbreak trend, a direct threat to people in disaster areas