&amp;lt;strong&amp;gt;Katrina, 2005:&amp;lt;/strong&amp;gt; Unforgettable &amp;lt;a href=&amp;quot;http://www.nhc.noaa.gov/data/tcr/AL122005_Katrina.pdf&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;Katrina&amp;lt;/a&amp;gt; -- the costliest hurricane and one of the five deadliest to hit the United States, according to NOAA -- devastated the Gulf Coast days after crossing Florida. Flooding destroyed thousands of homes in the New Orleans area alone; storm surges wiped out coastal towns in Mississippi. Here, people stand stranded on a roof in New Orleans.