I want the dam above the city to crack.
That's awful. Why do you want it to crack?
If so, the water would flood and hundreds of people will die.
You need to report the issue and get it fixed. That would destroy a lot of the city and harm a lot of people.
Nah, the city needs to be destroyed soon and they should all die.
But won't you feel bad about letting your city become a disaster area. It is where you live and where the people you know and love live.