Evergy outages frustrate customers on medical devices Several KC metro residents who rely on medical devices at night woke up to the equipment not working due to power outages. and last updated 2021-02-22 10:13:58-05 KANSAS CITY, Mo. â Dirk Mason jolted awake Tuesday morning, gasping for air when his BiPAP machine stopped working. "I pulled my mask off and tried to gasp for a breath of air, and I was like, 'What is going on?'" Mason, of Shawnee, said. The device helps with his heart condition and sleep apnea. The condition causes him to stop breathing nearly 100 times an hour.