When the mercurial thermometer is broken, first of all, we must evacuate all people and animals, quickly open windows for ventilation, and accelerate the evaporation of mercury in the air. In the next 1 to 2 weeks, try to keep indoor ventilation as much as possible. You can also ignite the concentration of mercury vapor in the air with iodine and alcohol. 10% bleach liquid can be used to wash the ground contaminated by mercury. Secondly, the scattered mercury will turn into mercury beads, which roll quickly. If the ground is smooth and flat, mercury may be scattered throughout the house, so check every corner of the house.