Derek Cleveland was at home during a power outage in a rainstorm last winter when a message popped up on his cellphone warning him he was about to have expensive damage done to his home. It was his ...

We’ve got some friends who have two sump pumps. One is a backup and sounds an alarm when it is switched on. But this only works as long as they’re home to hear it. [Felix Rusu] came up with a solution ...