danger sign

For an already beleaguered Ukraine, the development is yet another flashing danger sign.

Lactate wasn't a danger sign that athletes had depleted their body's supply of oxygen, but likely a normal product of the metabolic activity required to fuel the muscles during sustained exercise.

“The overall danger sign is the low number of people that turned out,” he said.

Finishing so close to Ms. Haley is a flashing danger sign for the viability of Mr. DeSantis’s campaign.

The 2022 midterms, in which a number of Democrats won competitive races after making abortion rights a central issue, were widely viewed as a danger sign for Republicans.