The Fire Severity Index
Fire outbreaks in the countryside can
present some dangerous and unpredictable situations.
Under exceptional weather conditions it is vital to be
attentive to possible hazards. A fire severity index has
therefore been set-up to forcast fire severity in
The fire severity index is represented by means of a simple
scale to predict possible circumstances.
The index has five levels of fire risk, from one [very low] to
A scoring of five would reflect extremely dry weather conditions
or dramatic changes in the condition of the land.
Please be aware that wildfires can occur at any value of
the Met Office Fire Severity Index. The information is subject to
Met Office Terms and Conditions (See the link below)
How is it used?
A Relevant Authority (Countryside Council for Wales,
Snowdonia National Park Authority, Brecon Beacons Park Authority,
Pembrokeshire Coast National Park Authority and the Forestry
Commission) can restrict the right of access.
For this to happen, the fire severity index must reach level
five and an official request for land restrictions must be
received from a landowner, tenant or other land manager.
How is it calculated?
The index collects and analyses information from wind speed,
temperature measurements, the time of year and rainfall to
produce the complete fire risk assessment.
These come from observations around the country and are received
directly from the MET office. We then publish this information on
the website each morning, with the current days risk level, plus
the predicted levels for the next five days. You can find more
information in the Met Office publication 'Met Office Fire Severity
Index' (see the link below).
Where can I find it?
The interactive countryside access map shows the index level for
today as well as the five day forecast, as soon as it comes
in. Please note that the predicted forecast for the next five
days will not be as accurate as the current day's forecast.
See the FSI levels by clicking on 'Open' on the
left hand side of the map window, then on 'Map
Scroll down the list until you reach 'Fire Severity
Index'. Click in the box to the left of 'Fire
Severity Index' then 'Update Map'.
The current days level will automatically colour the map. Move
the map around with the 'Move map' tool to
discover the level for your area.
For more help go to the 'How to use the map'
guide (see link below).
In summer or in very dry conditions, it's worth checking your
local conditions on the map daily.