Clean up flood waters.
Cleaning up will always be the step after the storm. Assuming they're talking about a hurricane, then the flood waters would need to be cleaned up. Besides for the last choice (which is utterly ridiculous!), those should be before and during the storm.
Depending on where you live and what kind of sever weather you encounter, a safety plan for you and your family is a must. You should always know where you can go to be safe from the elements and what to do during severe weather.
During the storm, stay away from windows. This pertains to all weather, including those with wind and lightning. Wind could blow debris that could possibly shatter glass and hurt you or others. With lightning, if it strikes the window, it will shatter it, merely from the heat of the contact.