Are there clamps for covers over slides? High winds!

Thank you for answering. We don't have an iPhone & didn't always have internet on our trip. I bought an iPad on the trip and later found out you can pay $15/mo to have service away from home but now that we ARE home I can use our regular wifi for everything. We heard on the news last night that other drivers in that storm were wondering why there wasn't a better warning from the transportation dept or police.