ST. LOUIS â€"  One person was confirmed dead and nearly 100 others injured Saturday when a tent collapsed near Busch Stadium in downtown St. Louis.

The St. Louis Post-Dispatch reported that the man who died suffered a heart attack. It was not immediately known if he was injured in the collapse or whether the shock triggered the heart attack.

Severe weather and high winds blew through the area, causing the tent outside Kilroy's Bar to collapse, KDSK-TV reported. Portions of the Midwest had been under severe weather warning early Saturday afternoon.

Kilroy's owner Art Randall said things were flying through the air sideways and metal chairs were being flung across the beer garden by the storm.

Witnesses said the storm lasted several seconds and estimated the winds were between 60 to 80 mph.

Emergency officials said 16 people were taken to hospitals with injuries ranging from minor to very serious. KSDK reported that fire officials said five people were in critical condition and 100 people were treated at the scene.

KMOX reports St. Louis Fire Chief Dennis Jenkerson says a few hundred people were celebrating in the tent after the Cardinals' victory over the Milwaukee Brewers when the storm hit.

The National Weather Service posted a tornado warning for the St. Louis area Saturday, with a risk of baseball-sized hail.

The Associated Press and NewsCore contributed to this report.