Officials painted a stark picture of the crisis so far: at least 40,000 homes damaged and 11 people killed.
At least eight people have died in the floods, which started Friday.
Rivers and creeks were still dangerously bloated in areas south of Baton Rouge.
Residents scrambled to get to safety as rivers and creeks burst their banks, swollen from days of heavy rain.
A man hit by lightning at a park in New York’s Hudson Valley died Saturday, a hospital spokesman said, while four other people wounded.
Farmland was covered and streets descended into impassable pools of water.
More than 20,000 people have been rescued from their homes as rain-swollen rivers flooded their banks .
Heavy rain and flooding in Louisiana leading the governor on Friday to declare a state of emergency.
Cleanup is underway after a tornado and high winds caused damage in several New Orleans neighborhoods..
Forecasters warned of the potential of more flooding in six states.
Forecasters say Tropical Storm Earl is expected to strengthen into a hurricane before it makes landfall.
Wildfires are burning in seven Western states.
Two people were killed when the town about 14 miles west of Baltimore took on 6.5 inches of water Saturday night.
Friday was clean-up day in some parts of south central Kansas following storms that blew through the area Thursday night.
Severe storms that blew through south central Kansas Thursday night left power outages.