RIO DE JANEIRO (AP) — The Latest on the 2016 Summer Olympics in Rio de Janeiro (all times local):
5 a.m.
The real test of Rio's dirty water — or maybe Olympic athletes' immune systems — is about to begin.
The women's 10-kilometer marathon swim is taking place Monday just off of Copacabana Beach and most of the elite swimmers will take about two hours to complete the 6.2-mile course.
Open water swimming is always difficult, but Rio de Janeiro's heavily polluted water is upping the ante this year.
A 16-month long independent analysis by The Associated Press has shown the water venues used by 1,400 athletes at the Rio Olympics are teeming with dangerous viruses from human sewage that could cause athletes to become ill.