You need permit for this

If I were you, I will just take couple of pumps over there. In an hr, I can all the waters out to street. And put a floor fan there to blow dry.

Then check his items that damaged. 就是为了心理有个数。

这是天灾，你不用赔他。看一下，拍照片。 为了不被他讹诈。

你可以带给a carmer and a smart switch over. 那样可以远程控制。抽完水就走人。几天后再来看，把东西都拿走。

这一套设备也就三百块。而且可以随时用。