Over 1000 of our tree treatments for control of Formosan termites in the New Orleans area since the year 2000 utilized an average of 10,000 gallons of water each (the size of these large warrens is unknown - we ran 500,000 gallons in one case and never filled the warren), suggesting that Formosan termite tree cavities are connected to vast subterranean warrens. This suggests that the bulk of our termite colonies are underground, feeding on prehistoric wood buried in the alluvium. A large number of these treatments was made in areas near the 4 levee breaches that drowned the city of New Orleans. Examination of trees and pilings at (1)Mirabeau and Pratt drive near the southern London Ave. canal breach, (2)the Tennessee Ave breach in the lower 9th ward, (3)the Algiers Ferry landing at the foot of Canal street, and (4)the site of Bruning's restaurant, just north of the 17th st. canal breach suggest that large subterranean connections exist under the levees, between the waterways and the land. It is postulated that our process of blowing bungs of termite dung in tree cavities to speed flow mimics what happened at the time of the surge initiated by hurricane Katrina. Canal water entered the undergroud warrens and the flow (supplied by an unlimited quantity of brackish water) eroded the warrens, causing the walls to collapse.