European heatwave fuels forest fires The second heatwave of the summer is pushing temperatures over 40 ̊C across Europe, fuelling wildfires from Portugal to Turkiye FIRE DANGER FORECAST Active fires Portugal: 96% in extreme or severe drought Italy: Fires “three times worse than average” Türkiye: 2021 fires worst on record EFFECT OF CHANGES IN JET STREAM Single jet stream: Linked to heat extremes over Mediterranean Weak winds, anomalously warm surface temperatures Single high-altitude air current Double jet stream Double jet linked to heat extremes over western Europe and Baltic Frequency of heatwaves increasing in Europe due to jet stream splitting in two for longer periods Source: European Forest Fire Information System, Nature © GRAPHIC NEWS