The communication disruptions caused by tropospheric ducting during heat domes can affect emergency services, public safety, and everyday devices. False alarms, such as the emergency siren activation in Indiana, may lead to alert fatigue, reducing public responsiveness to genuine emergencies. Additionally, interference with radio and television signals, as well as devices like pacemakers and internet routers, could pose risks to critical infrastructure and personal safety. High-frequency devices, including 5G cellphones, are particularly vulnerable to these effects (The Guardian, 2026-07-13).