NASA satellite images revealed 85 new hot spots that were spewing smoke across South Sumatera, Lampung, Bengkulu and Riau provinces.
The Antara news agency reports motorists are being urged to turn on their headlights even during the day to accommodate the low visibility caused by the smoke.
Health officials regularly advise residents affected by the smoke to wear facemasks and avoid outdoor activities when the smoke becomes thick.
A particularly extensive layer of thick smoke from Sumatran fires in 2006 prompted Indonesia’s president to apologize to officials downwind in Southeast Asia for not controlling the illegal blazes.
Image: NASA MODIS Rapid Response System