Water that came under a levee in Greenville, Miss., in 2011 caused this street to collapse. The city has had major floods twice since then, including record-breaking high water this year. Greenville’s mayor says many residents live in low-lying areas served by outdated infrastructure.

Water that came under a levee in Greenville, Miss., in 2011 caused this street to collapse. The city has had major floods twice since then, including record-breaking high water this year. Greenville’s mayor says many residents live in low-lying areas served by outdated infrastructure.