People have been warned against inhaling the smoke emissions and told to keep their faces covered with a wet cloth.
They should also not touch any particles fallen into their gardens and should inform the Army on telephone no. 0113818609 / 0112434251 about any such finding.
The fire has been brought under control, but not before one soldier was killed and 47 other persons injured, including 37 sustaining minor wounds, said director general of health services Dr. Palitha Mahipala.
Military spokesman Brig. Jayanath Jayaweera said soldiers were now inside the camp, where explosions could still be heard.
Immediately after the explosion yesterday afternoon, people living within a six kilometre area were evacuated.
Most of them are taking shelter at Kiriwandala temple at Puwakpitiya.