After Monday's tornado in Oklahoma, Allstate (NYSE:ALL), Progressive Insurance (NYSE:PGR), and Traveler's Companies (NYSE:TRV) all fell in the market. Along with AIG (NYSE:AIG), these insurance companies represent four of the top 10 providers for property and casualty insurance in the U.S. But when disaster strikes, should investors flee, or hunker down and wait it out?

In the video below, Motley Fool contributor Jessica Alling discusses the effect of catastrophic losses, what the insurance companies are doing about them, and how investors should feel about insurers going forward.