I'll start off stating that this was my fault in how I physically handled the device. Now that I know that this can happen I'll be able to prevent it in the future.
I have a PowerBox mounted at the top of a small relay tower. It poured rain and the wind blew hard for several days in a row last week. Even though the PowerBox was tightly closed and each of the cables had a good drip loop at the bottom a small amount of water still managed to work it's way inside. While I was doing some maintenance on that relay site about 48 hours after the rain ended, the combination of my handling of the device and the small amount of water in there reset the router and reset the radios that were connected to it. I had to replace the router and reprogram each of the 4 radios.
The physical handling included removing it from the mast and allowing it to lean over sideways. Had it been left alone in an upright position that water would have never caused a problem and would have eventually dried up. In the future, in similar circumstances I'll first open the bottom and check for water before removing it.
That was supposed to have been a quick 15 minute job on a Sunday afternoon that turned into an entire afternoon & evening of "ohhhh no, what did I do?!"