warning signal

Trinity House, which manages more than 60 lighthouses across the UK, said there was an issue with the "audible hazard warning signal" on Longships.

The warning signals flashed for Arsenal when, after almost total domination of possession, Spurs took the lead through Son Heung-min after 25 minutes.

A City Police inspector insisted that the usual warning signals were given.

Perhaps it is best to view them as warning signals.

A better understanding of the various tipping points and, above all, their typical early warning signals could prove essential for further climate change research and modeling.