Southern and eastern Europe are bracing for a severe heatwave this week, with daytime temperatures across the Balkans expected to soar into the high 30s to low 40s Celsius, significantly above the seasonal norm. Night-time temperatures will also remain uncomfortably high, often well into the 20s Celsius.
In densely urbanized areas like Athens, Greece, night-time temperatures could hover around or above 30°C due to the urban heat island (UHI) effect. The UHI effect exacerbates urban temperatures as heat-absorbing materials, reduced vegetation, and human activities retain the sun’s warmth overnight. This phenomenon increases health risks and energy demands, prompting national weather services across several countries to issue excessive heat warnings and advisories.
The intense heatwave, expected to persist through much of the week, poses significant health risks, particularly to vulnerable populations. Officials urge residents to stay hydrated, avoid strenuous activities, and seek air-conditioned environments. The heat also places a strain on energy infrastructure, with increased demand for cooling leading to potential power outages.
The prolonged dry and warm conditions, coupled with low humidity levels, have heightened the risk of wildfires. Last week, Albanian authorities requested EU assistance to combat wildfires in the Dropull district, located about 250 km south of the capital, Tirana. Over the weekend, numerous wildfires ignited in Greece and various regions of the Balkans and eastern Europe.
Greek officials report the country is facing its most severe wildfire risk in two decades. A mild and predominantly dry winter and spring have rendered vegetation extremely flammable, increasing the threat of wildfires. The drier-than-normal conditions over recent months have also led to critically low water reservoir levels, raising the possibility of water restrictions during the peak tourism season, especially on some Greek islands.
While the early formation of storms such as Alberto, Beryl, and Chris in late June and early July was facilitated by warm waters and a lack of dry air in the mid layers of the atmosphere, the Atlantic basin has since been relatively quiet. The presence of dry Saharan air, which inhibits the formation of tropical disturbances and cyclones, is expected to continue over the next few weeks, reducing tropical weather activity in the Atlantic Ocean.
As the heatwave continues to grip southern and eastern Europe, residents are advised to take necessary precautions to protect their health and safety. With the anticipated arrival of thunderstorms and cooler conditions by the weekend, relief is on the horizon. However, the increased risk of wildfires and potential water restrictions underscore the need for vigilance and preparedness in the face of extreme weather conditions.