An Indonesian official says there are more than 100 ` ` hot spots '' in South Asia . Fires have left thick blankets of haze over much of Sumatra , and Singapore and Malaysia . Haze from forest and peat fires has been a perennial problem for the region , particularly during the dry months . Aircraft are using cloud - clearing techniques in hopes rain will contain fires .
An Indonesian official says there are more than 100 ` ` hot spots '' in South Asia . Fires have left thick blankets of haze over much of Sumatra , and Singapore and Malaysia . Aircraft are using cloud - clearing techniques in hopes rain will contain fires .