Table 1.

Six time periods (T1–T6) identified for in-depth evaluation.

Period	Ending Point Knot	Duration (Days)	Description
T1	Day 225 (13 August 2005)	219	The pre-Katrina period, before the storm or major warnings and evacuations.
T2	Day 238 (26 August 2005)	13	The two weeks before Hurricane Katrina, when officials began issuing warnings, and evacuations began.
T3	Day 247 (4 September 2005)	9	The week immediately following Hurricane Katrina, starting the day before landfall, and ending at the peak.
T4	Day 275 (2 October 2005)	28	The first month following the immediate period.
T5	Day 303 (30 October 2005)	28	The second months after the immediate period.
T6	Day 710 (17 December 2006)	413	Post-Katrina period of stabilization and recovery.