Heavy rain fell in Jakarta, Indonesia, Tuesday for the first time in six months, bringing a cooling breeze and raising hopes that monsoon season will help put out smog-producing wildfires. The rainy season, which usually starts in October, was delayed this year by the El Nino phenomenon that has contributed to drought across this nation of 200 million people. Fires in many parts of Indonesia have spread a thick haze over much of Southeast Asia. Heavy rain, accompanied by thunder and lightning, fell before dawn Tuesday for about half an hour. In the afternoon, a breeze blew through Jakarta for the first time in weeks. More rain has been forecast, but environmentalists fear the monsoons will bring new problems, including acid rain, soil erosion and flooding.