Europe: High temperatures forecast to persist across southeastern regions through at least Aug. 27 /update 1

Event

High temperatures are forecast to persist across much of southeastern Europe through at least Aug. 27. The affected area includes much of Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Hungary, Kosovo, Montenegro, North Macedonia, Romania, Serbia, and Slovenia. Maximum temperatures of around 33-37 C (91-99 F) are forecast across much of the region, with localized higher temperatures possible.

As of Aug. 23, the various meteorological services for the respective countries have issued the following heat-related warnings across the region:

• Red high-temperature warnings (the highest level on a three-tier scale): Dubrovnik, Rijeka, and Split regions in Croatia.

• Orange high-temperature warnings: Across most of Bosnia and Herzegovina; Knin Region in Croatia; Baranya, Bacs-Kiskun, Bekes, Csongrad-Csanad, and Tolna counties in Hungary; across Kosovo; central and Adriatic coastal regions of Montenegro; central, southern, and southeastern North Macedonia; Braila, Dolj, Calarasi, Giurgiu, Ialomita, Ilfov, Olt and Teleorman counties and the city of Bucharest in Romania; most of Serbia with the exception of southwestern regions; and southwestern regions in Slovenia.

• Yellow high-temperature warnings: Across most of the rest of the affected area.

Officials could update and extend the coverage of weather alerts over the coming days.

The high temperatures may result in increased energy and water demand and a heightened risk of heat-related illnesses, such as heat exhaustion and heat stroke.

Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the region. Heatwaves also threaten vulnerable groups - such as the elderly, children, pregnant women, and those with respiratory illnesses - due to the increased possibility of heat stroke or heat exhaustion during prolonged exposure to high temperatures. These health risks could also extend to relatively healthy individuals during significant heatwave events.

Transport and Utilities
Very high temperatures may warp rail tracks and force passenger and freight trains to operate at reduced speeds. Road surface damage is also possible, and overheated vehicles may worsen traffic problems in urban areas where congestion is already a problem. Commercial trucking disruptions might occur as very high temperatures stress vehicles, making tire blowouts more common. Major flight disruptions are unlikely, but general aviation disruptions are possible, and some airfreight carriers could reduce cargo loads. High temperatures could lead to an increased demand for electricity, which might trigger localized brownouts or blackouts, exacerbating hazardous conditions when air conditioning is no longer possible.

Advice

Monitor local media for weather updates and related advisories. During heat waves, remain indoors in air conditioning when possible. If outdoor activities are necessary, frequently rest in shaded areas; avoid activity during the hottest times of the day. Stay well hydrated by drinking plenty of fluids. Avoid alcoholic beverages, which are dehydrating - drink bottled water or water that has been boiled. Wear loose-fitting, light-colored clothing. Cotton fabrics are more cooling than synthetics. Promptly seek medical attention if signs of heat exhaustion or heat stroke develop. Charge battery-powered devices in case prolonged electricity outages occur.

Resources

Meteo Alarm
Bosnia and Herzegovina Federal Hydrometeorological Institute
Bulgaria National Institute of Meteorology and Hydrology (NIMH)
Croatian Meteorological and Hydrological Service (DHMZ)
Meteorological Service of Hungary
Italy Meteorological Service
Republic Hydrometeorological Service of Serbia