BRUSSELS — The European Union is suffering its worst wildfire season on record, surpassing 1 million hectares burned on Thursday.

Fires have burned 1,016,000 hectares — an area larger than Cyprus or around a third of the size of Belgium — since January, data from the bloc’s European Forest Fire Information System analyzed by POLITICO shows.

This is the first time the EU hits the 1 million hectare milestone since EFFIS started keeping records in 2006. The previous worst wildfire season, in 2017, clocked just below 988,000 hectares.

Nearly two-thirds of losses occurred since Aug. 5, when EFFIS showed only 380,000 hectares burned. The vast majority of the fires have occurred in the Iberian Peninsula.

Spain accounts for more than 400,000 hectares burned, while in much-smaller Portugal, flames have consumed more than 270,000 hectares — or 3 percent of the country’s entire territory. In Spain, where records stretch back to the 1960s, this year is the worst fire season since 1994, according to government data.

Both countries have endured searing heat in recent weeks, desiccating forests and turning the peninsula into a tinderbox. Climate change is exacerbating wildfire risk, bringing more frequent and intense heat waves and droughts.

But scientists say that the main driver of the catastrophic fires in Spain and Portugal is an overabundance of flammable vegetation on abandoned land and authorities’ failure to take preventive measures. Spain’s special prosecutor for environmental issues this week opened an investigation into the lack of fire prevention plans.

Wildfires also release large amounts of planet-warming carbon dioxide, with the EU on track for a potential new record for fire-related pollution as well, EFFIS data shows.