According to Wikipedia, “Alkaline batteries are prone to leaking potassium hydroxide, a caustic agent that can cause respiratory, eye and skin irritation”. Make sure to check all electronics for leftover batteries before storing. Not only can battery leakage be dangerous to the body, it can also damage belongings.
2. Pressurized Cans & Bottles
The US library of congress suggest photographs should be at room temperature with 30-40% humidity. If you wish to store sensitive photos, look into climate controlled storage. Western NC often has unpredictable weather, so steer from putting old family photographs in the storage.