Central Europe: Heatwave forecast over Austria, Czech Republic, Hungary, Poland, Slovakia, and Slovenia through at least July 26 /update 1

Event

Forecast models indicate a heatwave will persist across Austria, Czech Republic, Hungary, Poland, Slovakia, and Slovenia through at least July 26. As of early July 22, authorities have issued the following heat warnings:

• Red (highest level on a three-tier scale) warnings: portions of Central Hungary, Central Transdanubia, Northern Great Plain, Southern Great Plain, and Southern Transdanubia regions in Hungary; portions of western Kuyavian-Pomeranian, Greater Poland, Lower Silesian, southeastern Lubusz, Opole, and western Silesian voivodeships in Poland through at least July 23; southwestern Slovenia through July 25.

• Orange warnings: eastern Austria through at least July 26; southeastern Czech Republic through at least July 23; most of the rest of Hungary through July 25; most of Poland through July 22; western southern, and central Slovakia through July 23; the rest of Slovenia through July 25.

• Yellow warnings: the rest of the affected area.

Further warnings will likely be issued in the coming days and may increase in severity as temperatures continue to rise.

Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for additional wildfire growth throughout the region. Heatwaves also pose a threat to 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. In addition to significantly impacting athletes and those who work outdoors, high temperatures can cause problems for people using mass transit. The lack of air conditioning and cramped vehicles during rush hour may lead to some passengers being hospitalized for dehydration.

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 put more stress on engines, making tire blowouts more common. Major flight disruptions are unlikely at regional airports, 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 heatwaves, 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 water that is bottled or 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

Austria Central Institute for Meteorology and Geodynamics
Czech Hydrometeorological Institute
Meteorological Service of Hungary
Poland Institute of Meteorology and Water Management
Slovak Hydrometeorological Institute
National Meteorological Service of Slovenia