Bangkok - The haze around the Malaysian capital Kuala Lumpur reached unhealthy levels on Tuesday as forest fires worsened in Indonesia's Sumatra, a month after haze from fires on the island blanketed parts of Malaysia and Singapore.
The air pollution index (API) in Kuala Lumpur reached 97, while in the nearby district of Port Klang it reached 103, the government's Environment Department said.
An API of 100 to 200 is considered unhealthy, while 200 to 300 is very unhealthy and more than 300 is hazardous.
Also on Tuesday, Singapore warned of an imminent pollution spike, saying satellite data showed “a marked increase in the number of hotspots in Sumatra”, referring to the heat signatures of apparent forest fires.
Ronnie Tay, head of the city-state's National Environment Agency, had contacted Indonesian authorities and “sought an urgent update of Indonesia's efforts to tackle the fires”, the agency said.