What is your highest number of deaths at once?

It was 5 sims I believe but it could be more, I can't remember anymore, but it was cheated because of the unforgiving deathrolls. I let them die by the lightning bolt for reasons, but this method isn't recommend, at a second time I used that method my game crashed. The highest number without cheats was 4 at once. It was a group meeting in a heat wave and I had created a group outfit, bad mistake. I didn't know how I could change the outfits of the others and suddenly all other members were dead. That was the end of this settlement game. :(