A girl plays in a fountain amid a heatwave in Budapest, Hungary, June 29, 2026. Hungary remains under a third-degree heat alert, the country's highest level, with temperatures forecast to reach between 35 and 40 degrees Celsius across much of the country in the coming days. (Photo by David Balogh/Xinhua)

A boy cools off with a mist cooling system amid a heatwave in Budapest, Hungary, June 29, 2026. Hungary remains under a third-degree heat alert, the country's highest level, with temperatures forecast to reach between 35 and 40 degrees Celsius across much of the country in the coming days. (Photo by David Balogh/Xinhua)

A man rests in the shade amid a heatwave in Budapest, Hungary, June 29, 2026. Hungary remains under a third-degree heat alert, the country's highest level, with temperatures forecast to reach between 35 and 40 degrees Celsius across much of the country in the coming days. (Photo by David Balogh/Xinhua)

People cool off with a mist cooling system amid a heatwave in Budapest, Hungary, June 29, 2026. Hungary remains under a third-degree heat alert, the country's highest level, with temperatures forecast to reach between 35 and 40 degrees Celsius across much of the country in the coming days. (Photo by David Balogh/Xinhua)

A man cools off near a pool amid a heatwave in Budapest, Hungary, June 29, 2026. Hungary remains under a third-degree heat alert, the country's highest level, with temperatures forecast to reach between 35 and 40 degrees Celsius across much of the country in the coming days. (Photo by David Balogh/Xinhua)

People play in a fountain amid a heatwave in Budapest, Hungary, June 29, 2026. Hungary remains under a third-degree heat alert, the country's highest level, with temperatures forecast to reach between 35 and 40 degrees Celsius across much of the country in the coming days. (Photo by David Balogh/Xinhua)

A girl enjoys a water spray device in Bucharest, Romania, June 29, 2026. Romania's National Meteorological Administration has issued the first Code Red warning of the summer as a severe heatwave blankets much of the country with temperatures expected to soar to 38-41 degrees Celsius. (Photo by Cristian Cristel/Xinhua)

A tourist cools off in Zvezda Park in Ljubljana, Slovenia, June 29, 2026. A record-shattering heatwave has tightened its grip on Europe. The temperatures in some cities of Slovenia rise to 36 degrees Celsius on Monday. (Photo by Zeljko Stevanic/Xinhua)

People walk through a water spray device to cool off in Bucharest, Romania, June 29, 2026. Romania's National Meteorological Administration has issued the first Code Red warning of the summer as a severe heatwave blankets much of the country with temperatures expected to soar to 38-41 degrees Celsius. (Photo by Cristian Cristel/Xinhua)

A public thermometer displays 40 degrees Celsius in Bucharest, Romania, June 29, 2026. Romania's National Meteorological Administration has issued the first Code Red warning of the summer as a severe heatwave blankets much of the country with temperatures expected to soar to 38-41 degrees Celsius. (Photo by Cristian Cristel/Xinhua)

A pigeon cools off at a public fountain in Bucharest, Romania, June 29, 2026. Romania's National Meteorological Administration has issued the first Code Red warning of the summer as a severe heatwave blankets much of the country with temperatures expected to soar to 38-41 degrees Celsius. (Photo by Cristian Cristel/Xinhua)

A woman enjoys a temporary artificial rain in Ljubljana, Slovenia, June 29, 2026. A record-shattering heatwave has tightened its grip on Europe. The temperatures in some cities of Slovenia rise to 36 degrees Celsius on Monday. (Photo by Zeljko Stevanic/Xinhua)

People relax on the bank of the Ljubljanica River in Ljubljana, Slovenia, June 29, 2026. A record-shattering heatwave has tightened its grip on Europe. The temperatures in some cities of Slovenia rise to 36 degrees Celsius on Monday. (Photo by Zeljko Stevanic/Xinhua)

People relax in the shade in a park in Ljubljana, Slovenia, June 29, 2026. A record-shattering heatwave has tightened its grip on Europe. The temperatures in some cities of Slovenia rise to 36 degrees Celsius on Monday. (Photo by Zeljko Stevanic/Xinhua)

People walk in the Old Town in Warsaw, Poland, June 29, 2026. Hot weather continued in Warsaw after Poland recorded its highest-ever temperature on June 28. (Photo by Jaap Arriens/Xinhua)

People use a water pump to cool off in the Old Town in Warsaw, Poland, June 29, 2026. Hot weather continued in Warsaw after Poland recorded its highest-ever temperature on June 28. (Photo by Jaap Arriens/Xinhua)