one reason hurricane katrina was so devastating for new orleans is that\no many people had to be rescued by…

one reason hurricane katrina was so devastating for new orleans is that\no many people had to be rescued by helicopter.\no no emergency shelters were available.\no people were surprised by the storm.\no many residents had not evacuated.
Answer
Brief Explanations:
The lack of evacuation meant more people were in harm - way when Hurricane Katrina hit, leading to greater devastation. Emergency shelters were available (e.g., the Superdome), and people were aware of the storm in advance. Rescue by helicopter is a consequence, not a cause of devastation.
Answer:
many residents had not evacuated.