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Huelva's Niebla wildfire is now threatening to become the worst environmental disaster in AndalucÃa's history
Eight days in, over 31,000 hectares burned and the fire is still spreading, with experts warning it is "very difficult" to extinguish
🔥 Impresionante el esfuerzo, una noche más, de la @UMEgob tanto en el #IFPeñasDeRiglos, en #Huesca, como en el #IFNiebla, en Huelva.
— Ministerio Defensa (@Defensagob) August 13, 2026
👨🚒 Misiones, entre otras, de perimetración, ataque directo con agua, reconociminto con dron aéreo, vigilancia y extinción de focos secundarios. pic.twitter.com/bKSz4eJXgG
Eight days after it began, the wildfire near Niebla in Huelva province shows little sign of relenting.
More than 31,000 hectares have now been consumed or enclosed within the fire's perimeter, more than 650 people remain displaced from their homes, and on Friday August 14 the flames pushed into new territory around Aznalcóllar in Seville province, reaching areas including El Campillo and Madroñalejo. Juan José Fernández, mayor of Aznalcóllar, described it as "especially worrying news," adding that it was a development "we hoped could have been avoided."
The fire broke out on Wednesday August 6 and quickly overwhelmed initial resources. At its most ferocious, authorities admitted it was beyond their ability to extinguish.
The 31,000 hectare figure needs some context. It represents the area enclosed within the fire's perimeter rather than entirely burned ground. Within that boundary, intact pockets of woodland, described as "islands," have survived. Even so, if confirmed by satellite imagery, the fire will surpass the 2004 Riotinto blaze as the most destructive in Andalucía's recorded history, a fire that killed two people, forced over a thousand from their homes and devastated communities whose livelihoods depended on cork and livestock farming.
Of the 724 people placed under preventive evacuation orders, only 62 remain in temporary shelters in nearby towns. The rest are staying in second homes, though that distinction does little to ease the anxiety of those watching the fire's progress from a distance.
Why is this fire so hard to stop?
Marc Castellnou, head of the Forest Action Group of the Catalan Fire Service and a leading national expert on wildfires, offered a sobering assessment on Friday morning. The fire has generated what he calls "a persistently modified atmosphere" that sustains constant high intensity burning, day and night, without pause.
It advances in a serpentine pattern, shifting east-northeast during the day and south at night, creating shifting fronts that progressively widen the eastern flank and open new daily runs that frustrate containment efforts. "What we experienced in 2004 is happening again now," he warned. "These overshoots occur every day."
He also pointed to an underlying structural problem. The fire is spreading across "very dense vegetation with very little management," a landscape vulnerability that mirrors the conditions in 2004 and raises uncomfortable questions about how these areas have been maintained in the years since.
Thursday had offered the first genuine reason for cautious optimism, with a change in wind conditions giving firefighters a real opportunity to make progress on parts of the northern perimeter. Antonio Sanz, Andalucía's Minister for Emergencies, reported that roughly two-thirds of the northern perimeter were free of active flames, allowing around 60 evacuated residents to return home. "Last night was one of the closest to our hopes and objectives," he said, though he was careful to add that "the afternoon will be tough again" and described the fire as "one of the most complicated in the history" of the region.
The operation fighting it is enormous. There are 761 personnel on the ground, drawn from the Infoca firefighting service, the Military Emergency Unit (UME), provincial fire consortiums, the Guardia Civil and paramedics, supported by 258 pieces of equipment including 18 bulldozers and up to 33 aircraft, with peaks of 22 operating simultaneously. The eastern sector, where the fire remains most active, is now the strategic priority, with mechanised firebreaks being extended and retardants applied ahead of worsening afternoon conditions.
With winds expected to gust above 35 km/h and humidity dropping below 40% through the afternoon, Friday is shaping up to be another defining test. The Aznalcóllar Ayuntamiento has urged residents to follow only official information channels, stay away from affected areas and keep roads clear. "Facilitating their work is essential to ensure their safety and allow the emergency response to operate as effectively as possible," said Mayor Fernández.
Image: Ministerio Defensa/X.com
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