The worsening haze has caused visibility to drop below 1km in affected areas.
As of 10am on Sunday, in Mersing, visibility is only 300 meters, the lowest recorded by the Meteorological Department.
In Batu Pahat visibility is at 600 metres and in Kluang and Malacca it is at only 500 and 800 metres respectively.
The Department did not have data on visibility for Muar, at which the Air Pollutant Index (API) reading has reached a record high of 746, above the "hazardous" level.
Meanwhile in the Klang Valley, visibility has dropped to 1km in Subang and Petaling Jaya.
Kuala Pilah, Negri Sembilan also recorded poor visibility at only 1km.
