In passing across LOCATION@1 , Katrina weakened to a tropical storm ; however , the warm waters of the LOCATION@2 allowed it to rapidly intensify to the sixth strongest LOCATION@3 hurricane in recorded history .

While passing across LOCATION@1 , Katrina weakened to a tropical storm ; however , the warm waters of the LOCATION@2 allowed it to rapidly intensify to the sixth strongest LOCATION@3 hurricane in recorded history .
