Whether it’s a green, yellow or red flag, Dawn Hinz who manages the flag warning system in South Haven said no water is guaranteed to be safe.

What does each beach flag color mean? Here's what to know before you go. 02:17 Nothing says a warm day quite like the beach, but beyond the shore lies a number of dangers, from rip currents and ...

The first traffic signals were not red, yellow and green. ... Well, in the 1840s the British railroads adopted a flag, lamp and semaphore signal system where red meant danger, ...

Yellow flag: Medium hazard — conditions present a moderate hazard. Swimmers should exercise extra caution. Red flag : High hazard — indicates high surf and/or strong currents.