early warning signs
- red flagsIndicators something's wrong
- alarm bellsSignals of impending trouble
- symptomsIndicators of disease
- indicatorsSigns that reveal status
- precursorsThings preceding others
harbingers · omens · foreshadowing · signals · clues · hints · tremors · cracks · smoke · rumbles · twinges · gut feeling · intuition · premonition · foreboding · canary · sirens · alerts
actionability
early warning signspoint of no return
Threshold beyond which reversal impossible
irreversible damage · too late · fait accompli · done deal · beyond help