More than 140,000 customers lost power in Texas, Mississippi, Louisiana, and Arkansas as of late Saturday. Responders pulled him from a drainage canal.
A county employee in Alabama died after being struck by a vehicle while he was helping clear away trees toppled by the storm.
In East Texas, two children were killed when a pine tree fell onto the back of the auto in which they were riding in a severe thunderstorm Saturday. Alto is about 130 miles southeast of Dallas. At least eight were critically hurt.
Almost 2,300 USA flights were canceled by Sunday evening, more then 90 percent of them at airports in Chicago; Houston, Texas; Charlotte, North Carolina; Pittsburgh; Columbus, Ohio and a dozen major airports on the Eastern Seaboard, according to FlightAware.com.
A tree lies on its side following a suspected tornado in Franklin, Texas, on Saturday, April 13, 2019.
Wind advisories will be in place for more than 55 million people, Hennen said. None of the injuries were thought to be life-threatening.
The watch came just hours after an earlier line of severe weather brought a few possible tornadoes to parts of north Georgia.
They say people at home can still help. Alto is situated about 140 miles (225 kilometers) north of Houston. No injuries have been reported, but officials said several businesses and vehicles were damaged.
The death was in Monroe County, Mississippi Emergency Management Agency Director Greg Michel said.
Local emergency management officials say one person is dead after a tornado swept through a northern MS town late Saturday.
The tree fell in Middletown after a band of severe thunderstorms pushed through New Jersey early Monday. Nineteen residents were taken to hospitals, including two in critical condition. A possible tornado knocked out power and left damage in Troy, about 50 miles (80 kilometres) south of Montgomery.
CNN affiliate KWTX reported widespread damage in the Robertson County town of Franklin, including uprooted trees and roofs ripped off buildings.
The weather also disrupted rail service in the region and caused some delays at airports.
The children were in a auto with their parents, when a massive tree fell on their vehicle due to strong winds, killing both minors on the spot.