Nice pictures. I have seen worse. The ground in most areas of the US does not freeze like it used to, and termites are more active than they used to be. I have seen them create trails up seven foot steel posts from basement floors to the wood floor joists. They also, over time, can climb from ground areas to homes with out needing a place to climb. The worse I have seen was at an older 1930 home that was unoccupied for years. I could not go down into the basement due to the rotted/damaged steps, so I leaned over and saw large mounds about 4 feet tall. Home had to be torn down. Good call here.