Karishma Vaswani
BBC News, Jakarta
Indonesia is struggling to contain the raging forest fires that are causing the thick smog which is enveloping Singapore, parts of Malaysia and some Indonesian cities.
On Friday, the government despatched helicopters to the worst affected areas, in a bid to create artificial rain. The plan is to seed the clouds once the temperature is a bit cooler to induce rain over the burning forestland.
It is a big challenge. Fire-fighters on the ground have been working around the clock to put out the blazes, but they have spread to peatlands and are proving to be very difficult to extinguish. Officials have complained about a lack of resources and say they desperately need some rain to help.
Indonesia's weather agency says rainfall is not likely until 29 June. Singapore and Malaysia have both urged Indonesia to do more to solve this crisis. Singapore has offered aircraft to help with the cloud-seeding operation, but there needs to be clouds in the sky for it to work. This time of year is typically the hottest and driest on the island of Sumatra.