Water intoxication, or hyponatremia, occurs when sodium levels in the blood drop too low. The condition can lead to brain swelling, seizures, coma and death.
On Tuesday, KDND's parent company, Entercom/Sacramento, fired 10 employees connected to the contest, including three morning disc jockeys. The company also took the morning show off the air.
Station spokesman Charles Sipkins said Wednesday that the company had not yet heard from the sheriff's department but that it would cooperate with the investigation.
Attorneys for the Strange family said Wednesday they plan to file a wrongful-death lawsuit against the radio station.