We do tend to get some unexpected sudden gusts of wind at night. I've collected chairs and umbrellas from Western Lake and the Gulf, and found other partially buried canopies, which I couldn't remove because they were under too much sand and water. Two weeks ago, I saw one of those big beach umbrellas, with the wooden spike post, go tumbling down the beach, outpacing the beach chair guys in pursuit. If it had hit someone with that spike, it would have gone straight through the person. Don't leave your tents, umbrellas and chairs unattended. If you do go inside for lunch, fold down your umbrella and tie it closed so that it doesn't become a hazard.