By Dewi Abdul Rahman
SHAH ALAM, July 21 — Selangor and the western region of Johor are among the areas most affected by transboundary haze, driven by southwest monsoon winds carrying smoke from forest fires in central and southern Sumatra, Indonesia.
Meteorological Department (MetMalaysia) deputy director-general (Operations) Ambun Dindang said satellite imagery confirmed the presence of a large number of hotspots in Sumatra, consistent with current wind patterns blowing smoke toward the west coast of Peninsular Malaysia.
“Satellite imagery can provide information on the location and number of hotspots or fire zones. It also helps detect areas experiencing haze. However, to predict the movement of the haze, we rely on forecasting models based on wind direction and speed.
“Satellite imagery has detected a large number of hotspots in Sumatra, while the movement of smoke has been consistently from the southwest, indicating that winds are carrying the smoke directly from the source of the fires toward our country, particularly along the west coast of Peninsular Malaysia," he told Media Selangor.
Ambun said while the situation has improved, the haze may persist if the fires are not brought under control and winds continue to blow from the same direction.
“This phenomenon is common during the southwest monsoon, which is typically hot and dry, contributing to forest and peatland fires in the region.
“If the number of fire-affected areas can be reduced or extinguished, haze will not occur. However, if the fires persist and winds continue to blow from the southwest, our country will continue to be affected,” he said.
Ambun added that the situation is expected to gradually improve with the onset of the monsoon transition phase around October, which typically brings more rain and humidity.
“By then, atmospheric conditions in our country will be more humid, and we do not expect forest fires to occur."
He advised the public to regularly monitor the Air Pollutant Index readings via the Environment Department’s website and to avoid open burning.
“The public is urged not to carry out open burning, to stay hydrated, limit outdoor activities, and wear face masks in affected areas."
