Katrina was the costliest natural disaster ever recorded in the United States. How has hurricane forecasting changed since it struck?

Emergency leaders say the kind of mass text alert system we have now that sends weather related warnings and emergency notices would have been a game changer.

This video shows aerial views of Varanasi, the Taj Mahal and Agra in India in 4K, letting the scenery speak without narration ...

This video shows aerial views of Madeira in Portugal in 4K, letting the scenery speak without narration. Filmed in Portugal with background music.

Twenty years ago today Hurricane Katrina slammed ashore in Louisiana as one of the costliest and deadliest U.S. disasters.

Twenty years ago, on Aug. 29, 2005, Hurricane Katrina cemented itself in history as one of the deadliest and most devastating ...

A brief summary of key facts and figures related to the storm, which changed New Orleans forever and remains the costliest ...

New Orleans is set to commemorate the 20th anniversary of Hurricane Katrina's devastating landfall on the Gulf Coast. Events including memorial services and a parade are planned to honor those ...

Twenty years after Hurricane Katrina crashed into the Gulf Coast, New Orleans is set to commemorate the anniversary Friday with memorials, performances and a parade to ...

On Aug. 29, 2005, Hurricane Katrina made landfall along the Gulf Coast, eventually taking thousands of lives and causing ...

ABC's Robin Roberts revisits New Orleans 20 years after the destruction of Hurricane Katrina for a news special on rebuilding ...

Three lessons from Katrina stand out today as the Trump administration talks about dismantling the Federal Emergency Management Agency and putting more responsibility for disaster management on local ...