I agree that shelter in place is a good philosophy. And as others have stated contact the atthorities and see what their plans are and how you can dove tail your situation into their plans. They should be able to at least supply you with more information. Possably even some proffesional level training for free.

But you may not have the luxury of staying in place. To be on the safe side work up a set or really several sets of evacuation plan on a just in case basis. This could entail how to aquire the needed amount of transportation. From buses to on foot. Where could you get the buses. Also plan for several routes out. If you only have one route it may lead to worse conditions. Give yourself the extra options.