Hello from the outside: heat domes impeding radio and other signals in US midwest

Higher temperatures can cause radio, TV and microwave signals to travel hundreds of miles farther, upsetting communications It was 3am in north-east Indiana’s Huntington county when the outdoor emergency alarm went off on 1 July. The only issue? There wasn’t a storm, tornado or any other emergency weather event forecast or present anywhere for hundreds of miles. Continue reading...

Stephen Starr · Mon, Jul 13, 2026, 8:00 AM
US news | The Guardian

Hello from the outside: heat domes impeding radio and other signals in US midwest

Higher temperatures can cause radio, TV and microwave signals to travel hundreds of miles farther, upsetting communications

It was 3am in north-east Indiana’s Huntington county when the outdoor emergency alarm went off on 1 July.

The only issue? There wasn’t a storm, tornado or any other emergency weather event forecast or present anywhere for hundreds of miles.

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