A triangle with an exclamation mark inside, used as a warning or alert.

This emoji is used prominently within social media platform BeReal's core time-sensitive "⚠️ Time to BeReal ⚠️" push notification. This notification is shown when being prompted to share a photo of themselves and their immediate surroundings, with this notification given within a randomly selected two-minute window every day. 

Waarschuwing is goedgekeurd als onderdeel van Unicode 4.0 in 2003 en toegevoegd aan Emoji 1.0 in 2015.