Following is link that depicts shattering of many lives in US and this is true wherever chlorine and other chemicals are handled.
http://www.environmentalhealthnews.org/ehs/news/2011/chlorine-accidents
Instantaneous release of chlorine from normal tonners containing about 900 kg chlorine can impact living beings even at a distance of 10 km under worst conditions i.e overcast sky, no wind; with fatalities upto 1 km. Unless otherwise the safe handling procedures are not practiced, these chemicals are much danger than explosives that affect people and property only upto few meters whereas these chemical releases impact persons staying even hundreds of meters away.