> For the complete documentation index, see [llms.txt](https://docs.answr.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.answr.space/api-data-layers/natural-disasters.md).

# Natural Disasters

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Here the available via the API climatic variables are presented and described. The detailed reference for the API can be found [here](/api-reference/natural-disasters.md).
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In the following sub pages the detailed description of each natural disaster data layer is presented.

{% content-ref url="/pages/JJVZVzSaIwqfNr6KHyGl" %}
[Cold Wave Probability](/api-data-layers/natural-disasters/cold-wave-probability.md)
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{% content-ref url="/pages/ZBpexHwutdNxRt4Rwn2s" %}
[Drought Probability](/api-data-layers/natural-disasters/drought-probability.md)
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{% content-ref url="/pages/hSqGR0QSeQMh6bgbk3KH" %}
[Flood Severity](/api-data-layers/natural-disasters/flood-severity.md)
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{% content-ref url="/pages/vtFLDkJB31FI37hboQPx" %}
[Heat Wave Probability](/api-data-layers/natural-disasters/heat-wave-probability.md)
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{% content-ref url="/pages/FfYYbhgL0dqjKUWDeuo4" %}
[Windstorm Probability](/api-data-layers/natural-disasters/windstorm-probability.md)
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{% content-ref url="/pages/VuWuOtTnAgXtuNCNgWFj" %}
[Wildfire Frequency Occurrence](/api-data-layers/natural-disasters/wildfire-frequency-occurrence.md)
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{% content-ref url="/pages/nGEkln8g7c63A4S4M0ch" %}
[Extreme Heat Probability](/api-data-layers/natural-disasters/extreme-heat-probability.md)
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{% content-ref url="/pages/2EcReolNcXl7ZTN86UAS" %}
[Extreme Cold Probability](/api-data-layers/natural-disasters/extreme-cold-probability.md)
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## **Probabilities of Occurrence**

The following table presents the summary for each natural disaster data layer that is available on the platform.

|       Hazard       |       Intensity Parameter       |                 Intensity Threshold                |  Period Duration in years |    Aggregation    |     Units    |
| :----------------: | :-----------------------------: | :------------------------------------------------: | :-----------------------: | :---------------: | :----------: |
|      Cold Wave     |     Cold Wave Duration Index    |           9 (High), 7 (Moderate), 5 (Low)          |             42            |      Monthly      |     Days     |
|       Drought      |       Consecutive Dry Days      |  80 (Extreme), 75 (High), 50 (Moderate), 30 (Low)  |             42            |      Seasonal     |     Days     |
|      Heat Wave     |     Heat Wave Duration Index    |           9 (High), 7 (Moderate), 5 (Low)          |             42            |      Monthly      |     Days     |
|      Windstorm     |         Mean Wind Speed         |        22.2 (High), 20 (Moderate), 15 (Low)        |             42            |      Monthly      |      m/s     |
|        Flood       |              Depth              |        0.5 (High), 0.3 (Moderate), 0.1 (Low)       | 10, 20, 50, 100, 200, 500 |       Yearly      |    meters    |
| Wildfire Frequency |       Per mill occurrence       |           3 (High), 2 (Moderate), 1 (Low)          |             22            | Whole time series | Clear number |
|    Extreme Heat    | Universal Thermal Climate Index |  46 (Extreme), 38 (High), 32 (Moderate), 26 (Low)  |             82            |      Monthly      |    Celsius   |
|    Extreme Cold    | Universal Thermal Climate Index | -40 (Extreme), -27 (High), -13 (Moderate), 0 (Low) |             82            |      Monthly      |    Celsius   |