What could be misconstrued as the English flag on the Barcelona crest is actually the symbol of St George's cross - but why is it there?

If you see a single flag that's half red and half yellow, the area you're in is among the safest on the beach. The flags indicate an area is protected by lifeguards and is being closely supervised.

A red flag means “high hazard,” so expect big waves and/or strong currents. You’re technically allowed to swim, but only skilled swimmers should do so (and with the utmost caution). 4.

A yellow flag means you can swim with caution, but the water can still be treacherous. “It’s just it is so risky, but not as risky as the red flag,” said Hinz.

Strong winds and currents trigger double red flags at Pensacola Beach on Wednesday. What is the beach flag color today? ... Yellow flag: Medium hazard — conditions present a moderate hazard.