Conversation so far:
when was new orleans told to evacuate for katrina
At a news conference 10:00 AM on August 28, shortly after Katrina was upgraded to a Category 5 storm, New Orleans mayor Ray Nagin ordered the first ever mandatory evacuation.
was there another option besides evacuation for katrina
The city government of New Orleans also established a refuge of last resort for citizens who could not leave the city, at the massive Louisiana Superdome.
how many people died in hurricane katrina
Hurricane Katrina caused 1,245–1,836 total fatalities.
what was the financial impact of hurricane katrina
Hurricane Katrina caused an estimated $125 billion (2005 USD) in damage.

Question: how often do similar storms happen
Self-contained rewrite: how often do hurricanes happen