On April 3, 2021, it was reported that Simmons had suffered a heart attack following a drug overdose and was being treated in the hospital in White Plains, New York. He was placed under life-support. He died six days later on April 9, aged 50.On April 24, a life celebration was held in his honour, that was shown via a YouTube livestream. During the celebration, a monster truck that contained his casket drove through where the mourners were standing.