Poppy does not perform at Grand Rapids, Michigan’s Upheaval Festival after wildfire smoke worsens local air quality. Multiple outlets report that the festival is affected by smoke coming from Canadian wildfires, which leads organizers to address the hazardous conditions. Poppy’s scheduled set is canceled or she does not appear, with one report quoting her describing difficulty breathing at the event. In her absence, her band performs instead, playing an instrumental set. According to the reports, band members take precautions by wearing N95 masks beneath their regular masks while they perform. The incident highlights how wildfire smoke from distant fires can affect outdoor events, including by limiting performers’ ability to safely breathe. The available coverage focuses on the air-quality impact, Poppy’s stated symptoms, and the band’s decision to continue the set while masked for protection. No additional details about timing, replacement performers, or any official festival statement are included in the provided excerpts.