Doctors treating victims of the Oklahoma tornado should be on alert for a rare deadly fungal infection caused by wind-whipped debris, NBC News has reported.
Five people died from similar infections following the 2011 twister in Joplin, Missouri, it said.
According to the broadcaster, government experts in such infections have warned clinicians to "be aware that these infections can happen".
The survivors of Monday's devastating tornado are pulling together to rebuild their homes.
Tonight visits Oklahoma as it begins to rebuild after Monday's devastating tornado to find out what causes the deadly storms.
Monday's tornado in Oklahoma has left survivors picking through the pieces of their lives - but others haven't been so lucky.