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The Effect on Cause of Fire by Weather Conditions
PETRÁK, Martin
The aim of this work is to assess the possible effects of meteorological conditions on the causes of fires (The Effect of Weather Conditions on Causes of Fire). At present great emphasis is put on the investigation of the causes of fire while detecting human or technical failure or the combination of the two. Meteorological influences are given less importance but in many cases they are the cause of technical failures, although often indirect. Under normal operating conditions, the burning process occurs when three basic conditions meet: there are flammable substances, oxidation and initiatory temperature. The direct cause means the impact of the initial temperature and the indirect cause means affecting the flammable substance or material itself and oxidation. As for the direct effects of meteorological conditions, only fires caused by lightning strikes are evaluated as the direct cause of fires in the statistics of Fire Rescue Service of the Czech Republic. Based on technical literature and findings of fire examiners from Fire Rescue Service of South Bohemia, we can easily conclude that fires can easily be started by direct sunlight and relatively simple optical elements. Indirect impact of weather conditions means a wide range of specific conditions which may affect flammable substances or oxidizing agents. On one hand there are specific conditions that affect technical and technological ageing and depreciation, such as extreme temperatures, both in summer and winter, rainfall, wind, and so on. On the other hand, weather conditions also affect activities and behaviour of people during the year. The research was based on monitoring the direct and indirect influence of weather conditions on the occurrence of fires in South Bohemia between the years 2009 and 2013. The findings were used to identify possible fire prevention strategies and to make it easier to identify certain weather conditions which may lead to a fire.The facts used in this thesis are based on technical literature monitoring the issue of fire protection, specialized literature from meteorology and climatology of the Czech Republic, Fire Rescue Service statistics and output from real-life fires which mainly occurred on the territory of the South Bohemia region.
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