blog posts Heat, humidity combining to create conditions at the limits of human survivability Aug 23, 2023 11:00 am by NBC NewsIllinois in the News Share on Facebook Tweet Email Images NBC News (Aug. 22) Climatologist Trent Ford says of the combination of high heat and humidity: 'It’s a nonlinear process – we can have significant community-scale health impacts at wet-bulb temperatures that are well below that threshold.' Share on Facebook Tweet Email