Actress Olivia Munn is worrying about her family after they were forced to take shelter from severe storms in her native Oklahoma.

Power was knocked out across the state on Tuesday evening (29May12) as strong rain and hail moved in, with experts issuing a tornado warning in certain areas.

Munn has now revealed her family is caught in the middle of the scare.

In a post on her Twitter.com page, she writes, "My family is in their shelter right now b/c (because) tornadoes are touching down in Oklahoma... I hope everyone else in my home state is safe!!"