"Based on our analysis, the wind in Riau is blowing from Southeast to Southwest direction at a maximum speed of 30 km per hour. Its direction is towards Malacca Strait," said Warih Budi Lestari, an analyst of the Pekanbaru meteorological, climatology and geophysics station, on Tuesday.
If the wind direction does not change, haze problem might return to Malaysia, like what had happened several months ago, he added.
In June 2013, Malaysia declared a state of emergency in some areas after air pollution from illegal burning of forests and peat lands in Indonesia reached hazardous levels.
The Terra and Aqua satellite has detected 297 hotspots from forest fires throughout Riau Province, according to the Pekanbaru meteorological, climatology, and geophysics station (BMKG).
"In Sumatra, the highest number of hotspots is still in Riau, with 297 of them, a significant increase from the 37 hotspots seen the previous day," Tri Puryanti, an analyst with the Pekanbaru BMKG, said here on Tuesday.
The hotspots have created a haze that is currently polluting the air of Riau`s cities and districts.
Pelalawan District alone has more than 100 hotspots, and others were found in the Indragiri Hulu District, Indragiri Hilir, and Kampar, Puryanti noted.
The haze reduced visibility in Pekanbaru to around 500 meters on Tuesday morning. (*)