What are typical signs that an unresponsive person who has been submerged may exhibit?

The typical signs that an unresponsive person who has been submerged may exhibit include vomiting, a swollen stomach, and foam coming out of the mouth or nose. These symptoms are indicative of near-drowning scenarios where water enters the lungs, causing difficulty in breathing and the body's response to aspirated water. The presence of foam often results from the mixture of water and air in the lungs, which can occur during respiratory distress after submersion. The swelling of the stomach may be related to the aspiration of water and other fluids, leading to abdominal distension. Recognizing these signs allows lifeguards and first responders to prioritize the necessary interventions such as providing effective rescue breathing and preparing for potential resuscitation efforts.