Hungary, Romania, and Slovakia: Heatwave forecast to persist over Hungary, Romania, and Slovakia through at least July 2 /update 1

Event

Forecast models indicate that a heatwave will persist across Hungary, Romania, and Slovakia through at least July 2.

As of June 29, the Hungarian Meteorological Service has issued red heat warnings (the highest level on a three-tier scale) for Bekes and Csongrad-Csanad counties. Daily mean temperatures above 29 C (84 F) are expected in these areas. Orange heat warnings have been issued across most of the rest of the country, with the exception of Vas and Zala counties, where yellow heat warnings have been issued. Daily mean temperatures above 27 C (81 F) and 25 C (77 F) are expected in the orange and yellow warning areas respectively. The red warning area will expand to cover Hajdu-Bihar and Jasz-Nagykun-Szolnok counties June 30.

The Romanian National Meteorological Administration has issued orange heat warnings (the middle level on a three-tier scale) across parts of western, northwestern, and central Romania June 29-July 1. Yellow heat warnings have been issued for the rest of the country during this period. Maximum temperatures of 33-37 C (91-97 F) are expected in the yellow warning areas and 37-38 C (97-100 F) in the orange warning areas.

The Slovak Hydrometeorological Institute (SHMU) has issued orange heat warnings (the middle level on a three-tier scale) across much of eastern, southern, and western Slovakia June 29 and yellow warnings across much of the rest of the country. Red warnings are in place across parts of southern and eastern Slovakia June 30-July 1, with orange and yellow warnings being maintained across the rest of the country. Temperatures of 33-34 C (91-93 F) are expected in the yellow warning areas, 35-37 C (95-97 F) in the orange warning areas, and 38 C (100 F) or above in the red warning areas.

Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming days.

Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for 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

MeteoAlarm
Hungarian Meteorological Service
Romanian National Meteorological Administration
Slovak Hydrometeorological Institute (SHMU)