Historical NASA satellite haze image, Borneo (2019) · public domain.
Indonesia is having its most intense wildfire season in 11 years, and the smoke has become a public-health problem far beyond the flames.
More than 12.5 million people across seven provinces have been exposed to haze from fires burning through forests and peatland, especially on Sumatra and Borneo.
By September 9, the number of wildfire-related respiratory illnesses recorded by Indonesia’s health ministry had jumped to 113,336 — more than double the 50,891 reported just eight days earlier.
In West Kalimantan, volunteers have been taking oxygen cylinders directly to residents and firefighters struggling to breathe. Nearly a million masks and hundreds of oxygen concentrators have also been sent to affected areas.
The fires are being made much harder to control by extreme heat and drought linked to a powerful El Niño. Peat fires are particularly nasty: they can keep burning underground even when the flames on the surface appear to be gone.
Indonesia has deployed more than 50 aircraft for water bombing and cloud seeding, while Japan has sent Chinook helicopters to help.
And the smoke does not respect borders.
Haze has drifted into Malaysia and Singapore, pushing air quality into unhealthy territory. In parts of Sarawak, Malaysia even declared an emergency after pollution reached hazardous levels.
For people in this part of the world, “haze season” can sound almost routine.
More than 12 million people breathing wildfire smoke is not routine.