The danger signs are usually red coloured because the red colour, has the longest wavelength compared to all other colours and could be easily observed through a naked eye from large distances.

A red flag warning on the beach is a serious safety alert issued by lifeguards or beach authorities. It signifies extremely dangerous swimming conditions due to strong currents, high surf, or a ...

More than 20 million Americans in eight states were under red flag warnings Tuesday morning as severe winds and dry conditions have elevated the threat of fire danger.. The alarming forecast comes ...

Red flags fly on beaches due to dangerous rip currents and high surf. Here's how to stay out of harms way. Red Flag Warning: Don't Ignore this beach danger sign ...