Tornadoes that tore through Mississippi Friday night have left at least 26 dead, dozens injured and four missing, according to the Mississippi Emergency Management Agency.

MSEMA expects those numbers to change, the agency said in a Twitter post.

The overnight storm destroyed buildings and knocked out power as severe weather produced hail the size of golf balls and moved through several southern states, according to the Associated Press.

Officials in Mississippi have been meeting to gather more information on the storm and determine a plan of action. Information regarding shelter and feeding operations was announced via MSEMA’s Twitter account.

The agency has asked residents not to self-deploy.

“Volunteer Mississippi is asking private citizens not to self-deploy. They will work to match unaffiliated volunteers with affiliated groups on the ground when the time is right. If you would like to donate water or resources, the Rolling Fork Civic Center is open to receive them,” MSEMA said on Twitter.