wake-up call - when something happens that shows you that you should be thinking about something or worried about some problem
Articles found:
- Dead whale sparks marine fears (05/06/2018)
- 75% of Thai universities could close as enrolment falls and foreign competition heats up (22/05/2017)
- Data Scientist: 'The Sexiest Job of the 21st Century' (04/04/2017)
- Coming down: Court orders big hotel destroyed (03/12/2014)
- Update: Space probe orbits around comet after 10-year journey (06/08/2014)