The storm has damaged buildings and caused massive power outages. President Joe Biden has promised federal assistance in the Gulf Coast region for "as long as it takes."
The storm caused flooding in New York City and sent the city into a state of emergency. Multiple tornadoes also hit the region.
Hurricane Ida hit the US coast after escalating into a Category 4 storm. Residents and officials are now facing what Louisiana Governor John Bel Edwards has warned could be the worst storm since the 1850s.
Hurricane Ida "continues to rage and ravage everything it comes in contact with" after it made landfall in Louisiana as a Category 4 storm, US President Joe Biden says during a visit to the headquarters of the Federal Emergency Management Agency in Washington. Powerful Hurricane Ida has battered the southern US state of Louisiana and plunged New Orleans into darkness, leaving at least one person dead 16 years to the day after Hurricane Katrina devastated the city.