Spanish authorities say the wildfire that has burned more than 25,000 hectares west of Madrid is now largely stabilised, with almost no visible flames and no active fire fronts remaining.
Regional officials said cooler overnight conditions helped strengthen containment lines around the blaze, which has shown no significant advance for several days.
Around 1,000 residents still displaced
Despite the improvement, around 1,000 people have yet to return to their homes.
The most sensitive area remains around San Juan reservoir, about 60 kilometres from central Madrid, where residents of San Martín de Valdeiglesias and Pelayos de la Presa are still awaiting clearance to return.
Heatwave raises fear of flare-ups
Authorities warned that the ongoing heatwave continues to pose a serious threat of reignition.
The Madrid regional government said wildfire danger remains very high to extreme in some areas, with firefighting efforts focused on monitoring for new hotspots, cooling affected zones and maintaining the stability of the fire perimeter.
Fire among Spain's largest this summer
The blaze erupted west of Madrid and has already scorched more than 25,000 hectares, making it one of Spain's most significant wildfires of the season.
While officials say there are currently no active fire fronts, emergency services remain on high alert due to forecast high temperatures and dry conditions.
