I accidentally killed an entire household

So I recreated my favorite kpop group in the sims and I wanted to take pictures of them. The sun started to set and I wanted to do this during the day so I used MCCC to cheat and change the time. The sims were all standing outside while I did this and it was in the summer. Little did I know that skipping the time forward would make the game consider that they actually spent all that time outside. As soon as I pressed play, they all dropped dead from overheating. 😭😭😭

EDIT: Since many people are curious about which group it was... it was Seventeen. Sorry