If you've noticed images of red flags filling up your Twitter feed, you're not alone. The platform is bursting with warnings about anything you can think of.

“Red flags” are dating warning signs, things that make you say, “Oh no.” Getty Images/iStockphoto ” ‘I don’t like Frank Ocean,’ ” a fan of the singer-songwriter tweeted ...

Supporters and opponents of the Los Angeles protesters see the prominence of the Mexican flag in different contexts.

A red flag warning comes around fairly rarely and is something people should be aware of. The West Coast has been hit by red flag warnings in the past, ... David McNew/Getty Images.

Nearly two years into an invasion with increasingly vague goals, recent photos show symbols from Russia’s Soviet past becoming increasingly mainstreamed as a rallying point for Russian troops.

While it served as an official state flag of Belarus from 1991 to 1995, its use was discouraged after a controversial 1995 referendum on state symbols that adopted a Soviet-style red-and-green ...