Five districts in Sarawak are experiencing unhealthy air quality following forest and land fires in Kalimantan, Indonesia. (Bernama pic)PETALING JAYA : The haze affecting several parts of Sarawak has worsened with five districts experiencing unhealthy air quality amid forest and land fires in Kalimantan, Indonesia. “The air quality worsened today with an increase in areas recording unhealthy levels of API, especially in Sarawak,” it said in a statement. Citing data from the Singapore-based Asean Specialised Meteorological Centre, it said there were currently 643 hotspots in Kalimantan, contributing to the hazy conditions. Action plans to combat open burning and haze have been activated by government agencies, it added.