US forces report no injuries from the barrage.
Malaysian Palm Oil Association chief executive Nageeb Wahab says open burning has been replaced with chipping of oil palm trees.
Industrial accidents are common in China, where safety regulations are often poorly enforced.
Rioters angered because firefighters were too slow to respond to the blaze.
Witness says he saw four men set fire to the house, and " was too scared to do anything".
Prime Minister Dr Mahathir Mohamad says the government will also instruct Malaysian firms outside the country to put out fires occurring on their plantations.
The air pollution index in Palangka Raya hit 500.
Only their mother's remains have been found, father still missing after two weeks.
The attacks have led to a production suspension of 5.7 million barrels of crude oil per day, or 50% of total output.
Thousands of personnel and water-bombing helicopters are only keeping the flames at bay.
The violence is complicating UN-led peace efforts to ease tensions between the Houthis and Saudi Arabia.
The cause of the fire is unknown, and there has been no official confirmation of the Al-Arabiya TV report, which cited its own correspondent.
The Conception's six crew members were asleep, five in berths behind the wheelhouse and the sixth in the below-decks bunk room when the blaze broke out.
The request comes as divers returned to the charred wreckage of the 23m Conception to begin raising it from the ocean floor, a crucial next step in the investigation.
A Maldivian news portal says one of the engines was on fire.
Authorities, including the transport ministry, are investigating the cause of the accident but are unable to provide further details.
The scuba boat fire tragedy in California has resulted in 25 deaths so far.
The US Coast Guard says its too early to confirm casualties.
Combined operation comes to an end but state fire chief calls for vigilance in view of the hot weather.
The row of wooden shophouses and single-storey terrace houses destroyed in a fire on Saturday was a symbol of the village and drew visitors, says Yong Siew Meng.
Firemen look for body of restaurant owner, aged 74, after fire razes 32 wooden shophouses believed to be a century-old.
20 shophouses, 11 homes and a library destroyed in blaze.
Firemen are trying to ascertain the whereabouts of a married couple said to have been in one of the buildings.
Reports say the fire broke out when attackers burst into the bar and threw Molotov cocktails inside.