Roommate flooded the kitchen and did nothing!!!

I’m renting a place with my friend and I told her I’ll be away on vacation for 2 weeks with my family. I come home and the whole kitchen is flooded and my roommate is just laying on the sofa watching tv. I asked her what the heck is going on and she just shrugged. She didn’t even bother calling someone to fix it. It looked like the kitchen had been flooded for DAYS and she’s been making dinner and eating in this mess. The repair bill came through and it’s going to cost a couple grand to fix all of this. WHAT THE HECK!!!!!!