In addition to direct strikes, lightning generates electrical surges that can damage electronic equipment some distance from the actual strike. Typical surge protectors will NOT protect equipment from a lightning strike. To the extent possible, unplug any appliances or electronic equipment from all conductors well before a thunderstorm threatens. This includes not only the electrical system, but also the reception system. If you plan to be away from your home when thunderstorms are possible, be sure to unplug unneeded equipment before you leave.
For a high level of security, select padlocks with pin-tumbler locking mechanisms, shackles of high-tech alloy steel to provide pull strength, and special weather-resistant plastic covers to stand up to the elements.