KL Tower is seen covered by haze on May 17 2011. A combination of large numbers of land-clearing fires and scorching weather, which sparks brush fires, has seen the number of hot spots in Sumatra go up in recent weeks. The effects of the heat and haze are being felt acutely in the Klang Valley, including Kuala Lumpur, driving many Malaysians as well as tourists indoors

Haze-swathed skyline of the Malaysian capital is seen on May 18 2011.A combination of large numbers of land-clearing fires and scorching weather, which sparks brush fires, has seen the number of hot spots in Sumatra go up in recent weeks. The effects of the heat and haze are being felt acutely in the Klang Valley, including Kuala Lumpur, driving many Malaysians as well as tourists indoors