The new number reflects the more moderate summer of 2025, when 104 days were above the coroner’s temperature threshold. Baskow/Las Vegas Review-Journal) @Left_Eye_ImagesAt least 191 people have died from causes related to Southern Nevada’s heat this year, the Clark County coroner’s office said on Monday, the last day of summer. Monday’s number reflects the more moderate summer of 2025, when 104 days were above the coroner’s temperature threshold. Drugs, heat remain deadly comboOf the 191 cases identified as heat-related, the coroner’s office released information about 169. Drug use persists as a common theme in heat-related death, as the body’s ability to cool itself sharply declines with drug use.