Chamas.pt

IPMA · 06/09/2026 11:00

Weather warnings in Portugal

IPMA weather warnings and civil protection alerts in Portugal: fire risk, wind, temperature and rain by district.

View fire riskView active fires

Active IPMA warnings

IPMA weather warnings are classified by color: green (information), yellow (risk), orange (high risk) and red (extreme risk). Chamas.pt displays the rural fire risk (RCM) on the main map and on the fire risk page.

For official updated weather warnings, visit the IPMA portal.

Warning types

  • Wind — warnings for gusts and strong sustained wind that can affect firefighting
  • Temperature — warnings for heat waves or extreme cold that influence fire risk
  • Precipitation — warnings for heavy rain that can reduce risk but cause other problems
  • Thunderstorm — warnings for thunderstorm activity that can start fires by lightning
  • Rural fire risk (RCM) — official index calculated per municipality by IPMA

Warning levels

ColorLevelMeaning
GreenInformationNormal conditions, no relevant risk
YellowRiskPossible adverse conditions, caution recommended
OrangeHigh riskProbable adverse conditions, precaution needed
RedExtreme riskDangerous conditions, protective measures mandatory

Relationship between warnings and fires

Rural fire risk depends on several meteorological factors: temperature, humidity, wind and recent precipitation. IPMA calculates the RCM (Conjunctural and Meteorological Risk) per municipality, combining the FWI (Fire Weather Index) with the territory hazard map. When the RCM is high, the probability of ignition and fire spread increases significantly.

Chamas.pt cross-references IPMA risk data with PROCIV/ANEPC incidents on the main map, allowing visualization of the correlation between weather conditions and active fires.

FAQ

Where can I see official IPMA warnings?

Official weather warnings are available at ipma.pt/en/avisos. Chamas.pt displays the rural fire risk on the fire risk page and on the map.

What is the difference between RCM and FWI?

The FWI (Fire Weather Index) is a meteorological index calculated from temperature, humidity, wind and precipitation. The RCM combines the FWI with the territory hazard map to produce the official rural fire risk index per municipality.