Officials are rushing to reschedule Mardi Gras celebrations and warning revelers against brining umbrellas and tents as powerful storms with a threat of tornadoes are expected to strike Louisiana and other parts of the South.

Mardi Gras gives people the opportunity to celebrate before the Lenten season, where people become more disciplined and give up habits for 40 days.

The city’s two biggest parades are set to go on with earlier start times, shorter routes, and no marching bands, New Orleans Police Superintendent Anne Kirkpatrick told reporters Monday.