Benzene is widely used in chemical industries and has a high potential to cause damage. The release of benzene from storage tanks can generate threats to workers, facilities, and the environment. The effects and consequences of benzene release from a storage tank during the dry and rainy seasons were investigated with the Areal Locations of Hazardous Atmospheres (ALOHA) software program. Risk distributions were obtained through threat zones classified by red, orange, and yellow colors. The results showed that the maximum hazard areas related to benzene vapor cloud and flammability in rainy seasons were greater than those in the dry seasons. There was no significant difference in the consequences of the thermal radiation from pool fire and the Boiling Liquid Expanding Vapor Explosion (BLEVE) scenario in both the rainy and dry seasons. The maximum threat zones were determined to be 2200 and 305 m for the toxic benzene vapor cloud and the flammable area, respectively. The consequences of the pool fire and BLEVE scenario of benzene were at a distance of 101 and 3600 m from the storage tank, respectively. This study is expected to play an important role for decision‐makers in preventing benzene‐related accident risks and to reducing loss.

The leakage of acetone from damaged tanks can threaten workers, surrounding facilities, and the environment. The safe storage of acetone is of vital importance for emergency planning and response. This paper focused on the effects and consequences of acetone leaks from a 200 m3 storage tank in the summer and winter seasons by the employment of Areal Locations of Hazardous Atmospheres. The hazard zones classified as red threat zone, orange threat zone, and yellow threat zone were determined and analyzed. Results showed that the risk distribution of the toxic acetone vapor cloud in summer was greater than those in winter. The summer and winter seasons have no significant effect on the thermal radiation intensities from pool fire and the Boiling Liquid Expanding Vapor Explosion (BLEVE) scenario. The maximum distance of toxicity, flammability, and thermal radiation from the pool fire and BLEVE scenario for the acetone leakage were 547, 111, 16, and 1100 m, respectively. The results would provide guidance for decision‐makers in safety management and emergency response to reduce hazards.