Singapore in haze over worsening smog

By Peter Shadbolt, for CNN

Updated 1732 GMT (0132 HKT) June 21, 2013

Students wear masks as haze shrouds Kuala Lumpur on June 23. Many schools in Malaysia were closed on Monday after air pollution caused by forest fires in Indonesia spiked to hazardous levels.
Photos: Singapore and Malaysia choked by smoke
Malaysia chokes on smoke – Students wear masks as haze shrouds Kuala Lumpur on June 23. Many schools in Malaysia were closed on Monday after air pollution caused by forest fires in Indonesia spiked to hazardous levels.
Hide Caption
1 of 15
Motorists drive as haze shrouds Malaysia's landmark Petronas Twins Towers in Kuala Lumpur on June 23. The Malaysian government declared a state of emergency on June 23 in two southern areas.
Photos: Singapore and Malaysia choked by smoke
Malaysia chokes on smoke – Motorists drive as haze shrouds Malaysia's landmark Petronas Twins Towers in Kuala Lumpur on June 23. The Malaysian government declared a state of emergency on June 23 in two southern areas.
Hide Caption
2 of 15
A woman helps her friend with a face mask as haze shrouds Kuala Lumpur on June 23.
Photos: Singapore and Malaysia choked by smoke
Malaysia chokes on smoke – A woman helps her friend with a face mask as haze shrouds Kuala Lumpur on June 23.
Hide Caption
3 of 15
Elderly people sign up to collect face masks at the community centre for the low income in Singapore on June 22, 2013.
Photos: Singapore and Malaysia choked by smoke
Singapore chokes on smoke – Elderly people sign up to collect face masks at the community centre for the low income in Singapore on June 22, 2013.
Hide Caption
4 of 15
Apartment buildings were shrouded in a haze of smoke on Wednesday, June 19, in Singapore. The city-state's worst pollution crisis in more than a decade, the haze stems from illegal slash-and-burn forest fires in neighbouring Sumatra, Indonesia.
Photos: Singapore and Malaysia choked by smoke
Singapore chokes on smoke – Apartment buildings were shrouded in a haze of smoke on Wednesday, June 19, in Singapore. The city-state's worst pollution crisis in more than a decade, the haze stems from illegal slash-and-burn forest fires in neighbouring Sumatra, Indonesia.
Hide Caption
5 of 15
An aerial photograph taken on June 17 showed smoke billowing from fires in areas surrounded by agricultural plantations in Rokan Hilir town in Sumatra, about 280 kilometers (173 miles) west of Singapore.
Photos: Singapore and Malaysia choked by smoke
Singapore chokes on smoke – An aerial photograph taken on June 17 showed smoke billowing from fires in areas surrounded by agricultural plantations in Rokan Hilir town in Sumatra, about 280 kilometers (173 miles) west of Singapore.
Hide Caption
6 of 15