The UK Foreign Office has updated its advice for Portugal following three days of forest fires in the Algarve.
Portuguese authorities are evacuating affected areas in and round the town of Monchique.
"If you are in this area, follow the instructions of the Portuguese police and Civil Protection authorities," the FCO told British visitors.
"For your own safety, travel to the Monchique area is not advised under any circumstances until cleared by the Portuguese authorities."
Flames have already consumed more than 1,000 hectares of forest despite efforts by more than 800 firefighters.
Wildfires in Portugal killed more than a hundred people last year. This year authorities were quick to act with evacuations.
Anyone who needs consular help or is worried about family or friends in the area should call (+351) 21 392 4000 or in the UK (+44) 207 008 1500.
Civil Protection Portugal can be reached on 800 246 246 or www.prociv.pt.
