The Mediterranean is warming 20% faster than other regions.

Omissions

• The standard formulation is '20% faster than the global average', not 'than other areas' — some regions (e.g. the Arctic) warm faster than the Mediterranean; the Mediterranean is singled out for its exposure and vulnerability, not for having the highest warming rate on Earth (IPCC AR6 CCP4 explicitly says so).
• The 20% figure originates in assessments published in 2020-2022 (MedECC MAR1; IPCC AR6 WGII); more recent Copernicus/WMO European State of the Climate 2025 (published April 2026) confirms Europe as the fastest-warming continent and record Mediterranean heat in 2025 but does not restate a specific 20% Mediterranean figure, so the precise percentage has not been re-quantified in the newest official reporting.
• For sea surface temperature the relative gap versus the global ocean is larger than 20% (MedECC: +1.3 °C Mediterranean vs +0.6 °C global, 1982-2019), so the 20% figure is a conservative atmospheric-warming comparison.

Sources

• PrimaryIPCC AR6 Working Group II, Cross-Chapter Paper 4: Mediterranean Region"Since the 1980s, Mediterranean atmospheric warming has exceeded global average rates (high confidence)... Future annual and summer warming rates are projected to be 20% and 50% larger than the global annual average, respectively." / "For the Mediterranean Basin, climate models consistently project regional warming at rates about 20% above global means... While it is not the region with the highest rate of expected warming on Earth, the Mediterranean Basin is considered particular... a 'climate change hotspot'."
• PrimaryUNEP/MAP – Barcelona Convention, Climate change in the Mediterranean factsheet"The Mediterranean region is warming 20% faster than the global average."
• PrimaryUnion for the Mediterranean / MedECC – First Mediterranean Assessment Report (MAR1)"the report shows that the Mediterranean basin is warming at a rate 20% faster than the global average, making the region one of the main climate change hotspots in the world."
• PrimaryCopernicus Climate Change Service / WMO – European State of the Climate 2025"Europe is warming more than twice as fast as the global average... In 2025, the continent saw record heatwaves from the Mediterranean to the Arctic, over land and in the ocean."
• AcademicMedECC – What climate change means for the Mediterranean Sea"Between 1982 and 2019, surface seawater temperature already increased by 1.3°C, compared to a global average increase of 0.6°C. The Mediterranean Sea is referred to as a 'hotspot of climate change'."