Therefore, it is now not possible to reliably predict what the PSI level might be over the race weekend. we will continu to work closely with all relevant government authorities to receive the best possible forecasts when they are available.

Smoke from huge forest fires in Indonesia has spread to neighbouring Singapore and Malaysia, with air pollution levels now bordering on “very unhealthy”.

A worsening haze across northern Indonesia, neighboring Singapore and parts of Malaysia on Tuesday forced some schools to close and airlines to delay flights, while Indonesia ordered a crackdown against lighting fires to clear forested land.

But Sivanandan Karunanandan, 27, a Singaporean graphic designer, said the threat of a hazy race weekend would not keep him away from the annual festival.

The night race at Singapore’s Marina Bay street circuit is the 13th event of the 2015 F1 season and is regarded as one of the most exciting races of the calendar year.

The haze situation could further deteriorate should the current unfavourable winds blow in denser haze from Sumatra. The PSI air quality index hit a “dangerous” high of 984 in the provincial capital this week, according to the national disaster management agency.

Air quality stations recorded unhealthy air levels early on Tuesday as the thick, dirty white haze blanketed large parts of the region. Over 22,500 cases of acute respiratory tract infections have been reported in southern Sumatra with 1,00,000 in East Kalimantan province.

A long-term solution is required to overcome the problem of haze arising from forest fires in Indonesia, Singapore’s Ambassador to Indonesia Anil Kumar Nayar stated.

If necessary, the agency would also send in additional helicopters to help water-bomb fires.

The Association of Southeast Asian Nations already has a 13-year-old agreement to resolve the trans-boundary pollution issue. The health advisory will be posted on all entrances at the circuit.

Bakar agreed to share the names of companies suspected of causing the fires with Singapore during a phone conversation with Singapore Environment Minister Vivian Balakrishnan Monday afternoon, authorities in the city-state said.

Singapore has passed legislation allowing authorities to fine companies that cause or contribute to haze, regardless of whether they have an office in the city-state.