Sunday marks the 16th anniversary of Hurricane Katrina’s landfall in Louisiana as a Category 3 storm. It also marks the expected landfall of Hurricane Ida, which is expected to come ashore south of New Orleans at Category 4 strength, unleashing 140 mph winds, flooding rain, and an ocean surge up to 15 feet.

In its 5 p.m. advisory, the National Hurricane Center warned of “extremely life-threatening inundation” and “potentially catastrophic wind damage” near where Ida comes ashore, as it boosted its predicted landfall intensity a category, from 3 to 4.

Anticipating flooding, New Orleans Mayor LaToy Cantrell issued a mandatory evacuation order for residents outside the city’s levee systemFriday and called for voluntary evacuations elsewhere in the city.

“If you have any medical needs or wish to voluntarily evacuate on your own, now is the time to start that voluntary evacuation,” Cantrell said at a Friday morning news conference…..

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