The slow-moving storm narrowly missed the country, where recovery efforts from Hurricane Dorian are just beginning.
At least four deaths in the Southeast were blamed on the storm.
Florida Gov. Ron DeSantis has already declared a state of emergency throughout the state to give officials and residents time to prepare.
Along Florida’s east coast, local governments began distributing sandbags and shoppers rushed to stock up on emergency supplies.
Many places facing excessive heat this weekend have no air conditioning, with cities opening shelters for people to cool off.
More than 100 local heat records are expected to fall Saturday, according to the National Weather Service.
Tropical Storm Barry is forecast to hit the city unusually early in the hurricane season, just as the Mississippi River is reaching abnormally high levels.
Federal authorities and social scientists struggle to create effective messages to inform and compel people to take action.
An Illinois meteorologist has been off the air since telling viewers the ominous warning was a "corporate initiative" that "many of us have tried to dissuade."
It also marked the end of the wettest 12-month period in NOAA's 125 years of record-keeping.
Research shows there's been an increase in tornado clusters and that twister activity is shifting eastward. Is there a fingerprint of planetary warming?
At least seven storm-related fatalities and dozens of injuries have been reported in the past week as storms swept across the nation.
The latest round of damaging weather in the central U.S. came a day after violent storms killed one person and injured at least 130 in Indiana and Ohio.
"I'm done with you people ... this is pathetic!" Fox 24 weatherman Jamie Simpson told viewers in the Dayton, Ohio, area.
A trailer park, car dealership and other businesses in El Reno suffered major damage.
At least three people died in a tornado in Golden City, Missouri, on Wednesday. Extreme weather has also threatened parts of Oklahoma, Kansas, Iowa and Illinois.
The storm has brought down trees and power lines and “extensively” damaged the tourist town of Puri.