A disturbance traveling through a medium by which energy is transferred from one particle of the medium to another without causing any permanent displacement of the medium itself. Waves are probably the single most dangerous naturally destructive occurrence on any shoreline. Try to imagine the weight of a large wave as it crashes on the beach or rocks, the force can be measured in tons per square inch. Most of the really serious injury accidents that occur in Hawaii's beaches are wave related injuries. Broken bones, lacerated skin, and bruised muscles are just a few of the injuries.
Spinal injuries are especially common with activities like surfing, body surfing, and body boarding.
Virtually all sports involving riding waves could be considered hazardous. In Hawaii there are several methods employed to warn beach users about conditions. Pay attention to any beach warnings you might see, they are there to protect you. A Red flag signifies that there is the possibility of severe wave action. A Yellow and Red flag signifies the possibility of severe Wind and Wave action.