A guide to the archive · Disaster
Follow the chain of events.
A disaster is easier to understand when its mechanism is visible. A layer of warm air can trap pollution, failed cooling can leave dangerous waste overheated, and deep lake water can store a large volume of gas. The stories here follow how a hazard became an exposure.
Begin with three cases that ask different questions about prevention. Each article separates the physical process from the damage it caused, then examines the response and the limits of the evidence.
London’s hazard accumulated in air, Mayak’s in stored waste, and Nyos’s in deep water. The comparison separates an explanation of the release from evidence about its consequences. Prevention must address the source or stored hazard; the most visible moment is only one part of each history.
Scroll across the table to compare all four columns.
| Case | Mechanism and decision | Evidence to follow | Limit of the conclusion |
|---|---|---|---|
| Great Smog, 1952 | Coal smoke and other pollution accumulated beneath an inversion. Later smoke-control areas addressed emissions rather than depending on different weather. | The Met Office explains the trapped pollution. The original 1956 Act, sections 11–12, sets out local smoke-control areas and support for adapting fireplaces. | The fog’s dispersal did not end the health effects. An excess-death estimate needs a time window and baseline; it is not a register of individually confirmed pollution deaths. |
| Kyshtym, 1957 | Loss of monitoring and cooling allowed waste to dry into salts that exploded chemically. Cleanup then created a large contaminated-waste problem. | Mayak’s retrospective presentation gives the tank failure sequence. IAEA’s 2022 report, Appendix V.1, documents soil removal and the difficulties of sorting the resulting waste. | Hosting an operator’s account does not independently verify every figure. Keep the tank explosion separate from other Mayak discharges, and state contamination thresholds when quoting areas. |
| Lake Nyos, 1986 | Deep water stored dissolved carbon dioxide. Controlled degassing later reduced that inventory, while continuing gas input meant removal needed monitoring. | NASA explains the deep-water gas reservoir. Kling and colleagues’ 2005 study measures gas reduction and models the balance between replenishment and pipe removal. | Evidence that degassing reduced stored gas is not proof that risk vanished. The 2005 study’s forecasts describe the equipment and measurements then, not the lake’s present condition. |
1952 · 2 min read
Why did London’s smoke stop dispersing?
In December 1952, a temperature inversion trapped coal smoke and other pollution close to the ground. The article explains that weather pattern, why estimates of the death toll use different time windows, and how smoke-control legislation addressed the sources of pollution.
Read the supporting sources →1957 · 2 min read
How could a waste tank contaminate a region?
At Mayak in 1957, a chemical explosion in stored radioactive waste spread contamination. The operator’s later reconstruction describes failed monitoring, lost cooling and dried salts. Follow that failure sequence and the cleanup, with the operator’s account clearly identified and other Mayak releases kept separate.
Read the supporting sources →1986 · 2 min read
What danger was stored beneath a quiet lake?
In August 1986, carbon dioxide escaped from Lake Nyos in Cameroon and spread into nearby valleys. The article explains gas accumulation in deep water, the evidence from survivors and the later use of controlled degassing. The mechanism and the uncertain initiating disturbance are different questions.
Read the supporting sources →