Category 4 Hurricane Ida lashes Louisiana and knocks out New Orleans power.

Hurricane Ida blasted ashore Sunday as one of the most powerful storms ever to hit the U.S., knocking out power to all of New Orleans, blowing roofs off buildings and reversing the flow of the Mississippi River as it rushed from the Louisiana coast into one of the nation’s most important industrial corridors.

The Category 4 storm hit on the same date Hurricane Katrina ravaged Louisiana and Mississippi 16 years earlier, coming ashore about 45 miles west of where Category 3 Katrina first struck land. Ida’s 150-mph winds tied it for the fifth-strongest hurricane to ever hit the mainland U.S. It dropped hours later to a Category 3 storm with maximum winds of 115 mph as it crawled inland, its eye 30 miles west of New Orleans.