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August 26

• 5 a.m.: After weakening briefly to a tropical storm, Katrina regains hurricane status and moves on to the Gulf of Mexico.

• 11:30 a.m.: The hurricane is upgraded to Category 2, with the storm's feeder bands continuing to pound the lower Florida Keys.

• 4 p.m.: The National Hurricane Center warns that Katrina is expected to reach dangerous Category 4 intensity before making landfall in Mississippi or Louisiana. Hours later, in anticipation of a possible landfall, Mississippi Gov. Haley Barbour and Louisiana Gov. Kathleen Blanco declare states of emergency.