Nevertheless,
What alert threshold your department?:
what alert threshold your department? A heat wave is defined by Météo-France as “An episode of high temperatures. For example, day and night, over an extended period”. Similarly, It corresponds to “orange” vigilance in cards intended for the general public – yellow is reserved for heat peaks. In addition, red to an extreme heat wave (defined by its temporal and geographic magnitude, and its health and social risks).
Less known. the threshold for triggering the heat wave alert varies from one department to another; The various what alert threshold your department? regions of France being more or less used and therefore adapted to heat, the alert thresholds are not the same everywhere. Thus. Météo-France believes that the heat wave will be proven in Deux-Sèvres when minimum temperatures of 35 ° C during the day and 20 ° C at night will be observed. The north will be considered in a heat wave when the temperatures exceed 33 ° C during the day. 18 ° C per night. In Paris. these thresholds are 31 ° C during the day and 21 ° C per night, and 34 ° C during the day and 20 ° C per night in Lyon.
This notion of “alert threshold” did not exist before the heat wave of 2003. Following this event which caused nearly 15. 000 dead, the health authorities and Météo France worked jointly in order to anticipate the most dangerous heat waves what alert threshold your department? for the population.
During a heat wave. certain factors are likely to worsen the health impact, such as air pollution – in particular by ozone and fine particles – and humidity, more difficult to bear by the human body. The intensity of the heat wave is defined from the difference between the value of the indicator. the alert threshold. But, how to define this threshold?
An indicator has been chosen: the combination of minimum. maximum temperatures averaged over three days, noted IBM (for bio-meteorological indicator). Then, alert thresholds were selected for the entire territory.
These thresholds have been reassessed over time. for example by revising the reference weather station for each department or by giving a higher weight to the night temperature. “If it is not only very hot during the day. but that this heat does not decrease enough during the night, the what alert threshold your department? body cannot recover and the health risk is increased”explains Public Health France.
Finally. these thresholds are also reviewed according to experience feedback: “In Marseille, the thresholds were reassessed to higher values (22-34 ° C vs 24-35 ° C) in 2009, taking into account the large number of alerts generated between 2004 and 2009, the low visible impact on health data, and the hypothesis that the city is better suited to heat”describes the public institute. In Haute-Loire, the heat wave alert is triggered from 17 degrees at night and 33 per day, against 18-32 ° C previously.
The passage from Orange to Rouge is notably linked to the observation of other indicators than the only temperature such as fire starts. drought of the soil, but also the attendance of care services. Again, it varies on the territory, details Météo-France: “A system of criteria has been defined for what alert threshold your department? each department (…) forecastists thus confront meteorological forecasts with the benchmarks established by Public Health France. based on epidemiological studies of past events, to estimate the level of heat wave. »»
What alert threshold your department?
Further reading: Media. Benjamin Duhamel, Nicolas Demorand, one more hour … France Inter unveils his new “Grande Matinale” – Paris Basketball crowned French champion after his victory against Monaco (99-93) – Loir-et-Cher: electric pylons completely folded by thunderstorms along the A10 – Are the harshs larger than before? – Thunderstorms in Gironde: cut roads, deleted trains, up to 8,000 private electricity households on the Arcachon basin.
