Following the previous critical 2015 Southeast Asian haze that traced its origin in Indonesia, forest fires in the country returned in July with 42,740 hectares (105,600 acres) of land burned across the country that causing trans-boundary haze towards Malaysia and Singapore.[14][15] The government sent 9000 military, police and disaster agency personnel to fight the fires.[16] As of September, there were 885,026 cases of severe respiratory infections due to the haze; 291,807 came from South Sumatra, 268,591 from Riau, and 163,662 from West Kalimantan.[17]