The National Hurricane Center forecasts life-threatening currents will reach the East Coast and Atlantic Canada by midweek.
Four residents of a nursing home in Louisiana died at their evacuation site in Tangipahoa Parish, according to the state's department of health.
Armyworms can turn a green lawn brown almost overnight. Tropical storms and Hurricane Ida may be contributing to the pests' spread across the US.
The city most-affected in the state is Baton Rouge, where more than half of gas stations are without fuel, according to GasBuddy data.
Social-media users blamed AT&T for cell outages during Hurricane Ida. AT&T's wireless network in Louisiana is now reported to be 85% operational.
More than a million people were left without power after Hurricane Ida hit the US Gulf Coast as a Category 4 storm on Sunday, 16 years after Katrina.
"All they talked about was the hurricane," the former president told the conservative radio host Todd Starnes.
Tens of thousands of people who evacuated now find themselves unable to return home as the region deals with ongoing flooding and power outages.
Over 1 million are without power after Hurricane Ida made landfall on August 29. The Category 4 storm was one of the most intense to ever hit the US.
A view from the ground in New Orleans after Hurricane Ida slams into the city, 16 years to the day after Hurricane Katrina.
New Orleans safety officials told residents to go to their nearest fire station or try to find a police officer for help as Hurricane Ida moved inland.
The Ascension Parish Sheriff's Office confirmed that a person died when a tree fell on a house near Baton Rouge, Louisiana.
Although Hurricane Katrina also reversed the flow of the Mississippi River, the phenomenon is extremely uncommon.
CoreLogic estimates that the reconstruction cost value of the potentially damaged homes is approximately $220.37 billion.
About 50,000 New Englanders remain without power after Henri made landfall in the area on Sunday. Henri has been downgraded to a tropical depression.
The storm system is forecast to bring heavy rainfall and flooding to the Atlantic coast through Monday.
Tropical storm Henri has made landfall in Westerly, Rhode Island, packing 60 mph winds and causing initial flooding.