If you own a house in the country or near a forest you are more vulnerable to fires. Eucalyptus trees are extremely flammable so please check for this at house viewings and also check if you are in a high risk area.

Contact your local Câmara if you are unsure of the rules of burning debris especially within the critical fire period as you may need prior formal approval or a permit in some cases. You will be asked questions such as date of fire, location, time and the items you are wanting to burn so they know when controlled burning is taking place.

http://safecommunitiesportugal.com/forest-fires/

UPDATE:

As part of the extension of the state of emergency decreed by the president of Portugal, the deadline for owners to clear land that ended on 15th March has now been extended to 30th April 2020. The range is 50 metres around buildings or facilities located in rural or forestry areas.