World Cup finals cancelled because of 'very unhealthy' smog
Forest fires in Indonesia meant 11 World Cup swimming finals in Singapore were cancelled at an hour's notice.
Smoke and haze from the fires on the Indonesian island of Sumatra have been affecting Singapore for weeks.
Air quality - as measured by the country's Pollutant Standards Index - was rated 'very unhealthy' on Saturday.
Medals were awarded on times recorded in the day's heats, meaning USA's Missy Franklin beat Australia's Emily Seebohm in the women's 200m backstroke.