Bloomberg reports that wildfires briefly closed the Dardanelles Strait to traffic on August 11, as extreme heat and powerful winds fueled blazes across the Mediterranean. A vital maritime chokepoint for oil and gas from the Black Sea and Central Asia, the Dardanelles reopened in the evening after authorities closed it to allow firefighting aircraft to draw water from the sea to battle nearby fires. Turkish firefighters are bringing wildfires under control that have ravaged northern Aegean shores, though towns and pine forests in Çanakkale province remain under threat, with approximately 2,900 residents evacuated, according to reporting by state-run Anadolu Agency. Vast swaths of Europe face wildfire threats as scorching heat bakes the region this week. Blazes have erupted across the continent, from suburbs of Madrid and London to Greek islands and forests spanning the Balkans. The fires are fueled by powerful winds and extreme temperatures.
From a supply chain perspective, the Dardanelles Strait connects the Mediterranean Sea to the Marmara Sea, serving alongside the Bosphorus Strait as the sole maritime passage from the Black Sea to the Mediterranean. The Montreux Convention of 1936 is the international agreement establishing Turkish sovereignty over the Turkish Straits and governing transit. The Dardanelles and Bosphorus handle 3 to 4 million barrels of crude oil daily, along with LNG, grain, containers, and dry bulk—forming a critical chokepoint for exports originating from Russian ports (Novorossiysk, Tuapse); Kazakh sources (CPC Pipeline—Tengiz); Azerbaijani supplies (BTC Pipeline—Ceyhan, Baku-Supsa Pipeline); and Ukrainian sources (Odesa, Pivdennyi, Chornomorsk). The U.S. Energy Information Administration (EIA) classifies the Turkish Straits as one of the world's most important maritime chokepoints for global oil flows, alongside the Strait of Hormuz, Strait of Malacca, Bab el-Mandab, Suez Canal, Panama Canal, Cape of Good Hope, and Danish Straits as major global chokepoints.
From a supply chain perspective, the 2025 Mediterranean fire season is well above average according to European Forest Fire Information System (EFFIS) data, with Spain, Greece, Portugal, Italy, France, Croatia, Albania, North Macedonia, Cyprus, and Türkiye among the most heavily affected countries. The Copernicus Climate Change Service (C3S) reports that 2024 was globally the warmest year on record, the first year to exceed the 1.5°C threshold. The Mediterranean basin is warming 20 percent faster than the global average—defined as a "climate change hotspot" according to the IPCC (Intergovernmental Panel on Climate Change). Wildfires impact supply chains through maritime strait closures, reduced air visibility, damage to railway tracks, highway closures, power outages, health impacts (PM2.5/PM10), tourism revenue losses, agricultural and livestock effects, and increased insurance premiums. Türkiye's principal wildfire and disaster response agencies are the Ministry of Agriculture and Forestry (OGM; General Directorate of Forests) and AFAD (Disaster and Emergency Management Authority).
From a supply chain perspective, the impacts of Turkish Straits closure include: (1) increased tanker waiting times—higher demurrage fees; (2) widening spreads between Brent Crude and Urals oil prices; (3) trade effects on the BSEC (Black Sea Economic Cooperation) region; (4) delays in Russian, Kazakh, and Ukrainian grain exports (under the Black Sea Grain Initiative or individually); (5) LNG carrier delays—affecting flows from Russia to Türkiye and Russia to the EU; (6) rerouting of container ships. Türkiye's primary Strait crossing infrastructure includes the Çanakkale Bridge (1915 Çanakkale Bridge; opened in 2022—the world's longest suspension bridge), Marmaray (Asia-Europe rail tunnel), and the Avrasya Tunnel (highway). The Dardanelles region has historically hosted major events including the Trojan War and the Battle of Gallipoli from 1915–1916, and is home to UNESCO World Heritage sites such as the Troy Archaeological Site and Gallipoli Battlefields. In conclusion, the brief closure of the Dardanelles once again demonstrates the persistent and growing threat that extreme weather events caused by climate change pose to global supply chains—requiring Türkiye and all Mediterranean countries to invest in wildfire preparedness.
Key Points:
1. Dardanelles Strait briefly closed on August 11 due to wildfires.
2. Black Sea–Mediterranean oil, gas, and grain trade make it a critical chokepoint.
3. Approximately 2,900 residents evacuated from Çanakkale province—Anadolu Agency reports.
4. Mediterranean basin warming 20 percent faster than global average.
5. Spain, Greece, Portugal, Italy, France, and Türkiye among the most affected by 2025 wildfires.
