Fire Weather Index FWI
The Fire Weather Index (FWI) is worldwide index used to estimate fire danger risk. It is meteorologically based and consists of different elements that take account of the effects of fuel moisture and wind on the behaviour and spread of fire. The higher the FWI, the higher the risk - or the more favourable meteorological conditions are to trigger a wildfire.
This indicator can help shape long-term tourism strategies and future investments under a changing climate.
MAIN VARIABLES | ||
NAME | UNITS | DESCRIPTION |
Daily fire weather index | Dimensionless | The fire weather index values at a daily temporal resolution for the selected year. The higher the index value, the more favourable the meteorological conditions to trigger a wildfire are. |
Number of days with high fire danger | Count | Number of days per year with a fire weather index greater than 30 based upon the European Forest Fire Information System (EFFIS) classification. |
Number of days with moderate fire danger | Count | The number of days per year with a daily fire weather index greater than 15 based upon the European Forest Fire Information System (EFFIS) classification. |
Number of days with very high fire danger | Count | Number of days per year with a fire weather index greater than 45 based upon the European Forest Fire Information System (EFFIS) classification. |
Seasonal fire weather index | Dimensionless | The mean fire weather index value over the European fire season (June-September). This is calculated as the sum of the daily fire weather index over the European fire season divided by the total number of days within this date range. The higher the index value, the more favourable the meteorological conditions to trigger a wildfire are. |
Source : https://climate.copernicus.eu/fire-weather-index
[edit] Related articles on Designing Buildings
Featured articles and news
Boiler Upgrade Scheme and certifications consultation
Summary of government consultation which closes 11 June 2025.
Deputy editor of AT, Tim Fraser, discusses the newly formed society with its current chair, Chris Halligan MCIAT.
Barratt Lo-E passivhaus standard homes planned enmasse
With an initial 728 Lo-E homes across two sites and many more planned for the future.
Government urged to uphold Warm Homes commitment
ECA and industry bodies write to Government concerning its 13.2 billion Warm Homes manifesto commitment.
Places of Worship in Britain and Ireland, 1929-1990. Book review.
The emancipation of women in art.
CIOB Construction Manager of the Year 2025
Just one of the winners at the CIOB Awards 2025.
Call for independent National Grenfell oversight mechanism
MHCLG share findings of Building Safety Inquiry in letter to Secretary of State and Minister for Building Safety.
The Architectural Technology Awards
AT Awards now open for this the sixth decade of CIAT.
50th Golden anniversary ECA Edmundson awards
Deadline for submissions Friday 30 May 2025.
The benefits of precast, off-site foundation systems
Top ten benefits of this notable innovation.
Encouraging individuals to take action saving water at home, work, and in their communities.
Takes a community to support mental health and wellbeing
The why of becoming a Mental Health Instructor explained.
Mental health awareness week 13-18 May
The theme is communities, they can provide a sense of belonging, safety, support in hard times, and a sense purpose.
Mental health support on the rise but workers still struggling
CIOB Understanding Mental Health in the Built Environment 2025 shows.
Design and construction material libraries
Material, sample, product or detail libraries a key component of any architectural design practice.
Construction Products Reform Green Paper and Consultation
Still time to respond as consultation closes on 21 May 2025.
Resilient façade systems for smog reduction in Shanghai
A technical approach using computer simulation and analysis of solar radiation, wind patterns, and ventilation.