The BMA and Pollution Control Department warned people not to smoke or create sparks near drains on an 85-metre stretch of Rama III Road (Klong Toey and Yannawa), where VOC readings of 350 ppm pose explosion and fire risk. Ten manholes show oil leaks, and 50-metre sections of the local drainage are blocked while crews pump out 5,000 litres of contaminated wastewater. If your shop, warehouse or delivery route is on this stretch, avoid hot work and smoking outside, expect access disruption and odour, and follow any official instructions. The source of the leak is not yet known.