"levee failures" . "levees broke" . "crevasse" . "levee breach" . . "breach" . "overtopping" . . "overtopped" . "dike breaches" . "dike breached" . "Dyke breach" . "Levee breach" . "breached levee" . . . "crevasses" . . "breaches" . . "Levee breach" . "breached" . "Levee overtopping" . "Cr\u00E9vasse" .