Omg, Noooo! Evil rotten lizard lol
I hate that lizard! Fyi, he's going for your garbage dump. Depending on where he spawns, he can destroy half a map on his way. You can sometimes minimize the damage. Next time, if you see him appear, pause the game, and plop a new garbage dump in his path. He will go for the dump closest to him, and at least you won't have pollution due to destroying the dumps along with the other rebuilding.
I hope your orphaned vehicles get tired of driving around the city and eventually leave. What a pain!