In hard-hit Mississippi, Alabama and Tennessee, at least 17 people were killed on Monday, CNN television said. Another 18 were reported dead in Arkansas, Iowa and Oklahoma on Sunday.
But forecasters warned more brutal weather was set to hit, affecting an estimated 70 million people.
The National Weather Service said that "severe thunderstorms" were expected in eastern and southern Mississippi, western Alabama and extreme eastern Louisiana.
Among the dead was University of Alabama student John Servati, who perished saving his girlfriend from a wall that fell and would have otherwise crushed her, The Clarion-Ledger reported.
"I called my coach when I found out this morning; we just kind of balled for a moment," high school friend Colton Fremont said.
"It was surreal to hear one of my best swimming friends I've had my entire life is gone just like that."
People in Tupelo, Mississippi sifted through the rubble of their destroyed homes and businesses.
"I am just overwhelmed -- the damage is overwhelming, of course, but the outpouring of people to lend a hand and give out water and food, it's just tremendous," said Denise Hardin of the Tupelo Housing Authority that manages many neighborhood properties.
The tornado that ripped through Louisville, Mississippi was given a preliminary rating of at least EF4 by national forecasters.
At 265-320 kilometres per hour, that would make the storm one of the strongest to strike the US this year.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
