Indonesia is carrying out wide-ranging efforts to curb major forest and peatland fires, but response teams are still struggling to contain the blazes, a senior official says. Officials report that dozens of aircraft and thousands of personnel are deployed to tackle the fires.

Sources also point to the underlying challenges that make suppression difficult. Indonesia’s extremely large territory and the difficult terrain and conditions of peatlands slow access and hamper firefighting. The scale of the affected areas and the complexity of peat fires contribute to delays in bringing fires under control, according to the official descriptions reported by outlets.