洪灾作为美国最严重的自然灾害之一,加强对全民防洪减灾的教育宣传,普及知识,提高防灾自救能力,是不可忽视的重要减灾措施。为此,美国联邦应急管理部门利用网络媒体向群众大力宣传防洪减灾措施,列出了 As one of the most serious natural disasters in the United States, the flood disaster is an important disaster reduction measure that can not be neglected, so as to strengthen education and publicity on flood control and disaster reduction for all people, popularize knowledge and improve self-help capacity for disaster prevention. To this end, the US Federal Emergency Management Department using online media to publicize flood control and mitigation measures to the masses, listed