Ten fire engines have been pressed into service to douse the blaze.
The fire intensified on Sunday evening and spread to two-three square kilometers. As toxic smoke enveloped and extensive area with many reportedly complaining of discomfort and breathing problem.
In many schools in the area, children appearing for their exams were seen wearing masks.
A massive fire had broken out at the city's biggest dumping yard, spread across 326 acres, on January 27. It was brought under control after seven days of round-the-clock fire-fighting.