1930 Meuse Valley fog
The Meuse river flows from France, through Belgium and the Netherlands before entering the North Sea. The area in the Meuse Valley where the incident occurred is densely populated as well as having many factories. There were several thousand cases of illness over the period of two or three days with the sixty deaths occurring at the same time. Fifty six of the deaths were to the east of Engis.
A statue and plaque commemorating those who died was inaugurated in Engis on 2 December 2000.
- Roholm, K. (1937). "The fog disaster in the Meuse Valley, 1930: A fluorine intoxication". J. Ind. Hyg. Toxicol 19 (3): 126–137.
- Nemery, Benoit; Peter HM Hoet, Abderrahim Nemmar (2001). "The Meuse Valley fog of 1930: an air pollution disaster". The Lancet 357 (9257): 704–708. doi:10.1016/S0140-6736(00)04135-0. ISSN 0140-6736.
- Firket, J. (1936). "Fog along the Meuse valley". Transactions of the Faraday Society 32: 1192. doi:10.1039/TF9363201192. ISSN 0014-7672.