How the devastation of Hurricane Harvey compares with Hurricane Katrina

August 29 marks the 12th anniversary of when Hurricane Katrina pummeled New Orleans in 2005. Now Hurricane Harvey is advancing through Louisiana,

Katrina, one of five of the deadliest storms in United States history, killed over 1,800 people as flood walls and levees failed. The hurricane started over the Bahamas on August 23. It then headed westward toward Mississippi, Florida, the Gulf of Mexico, and southeast Louisiana.

Over a decade later, Katrina has cost the country at least $100 billion, making it the most expensive natural disaster ever in the US. Harvey is also expected to cause millions in damages.

On the anniversary, President Donald Trump will also visit Corpus Christi and Austin, Texas to assess the ongoing damage from Harvey. The now-tropical storm is evoking images of Katrina for many who are now evacuating and waiting to be rescued in Louisiana and Texas.

Here's what we know so far about the similarities and differences between the two disasters.