The authority noted that river levels across Europe are critically low.

The new record comes as Hungary prepares for the second significant heatwave of the summer, with dry, increasingly hot weather forecast through the end of the week, according to weather portal Időkép.hu.

Wednesday is expected to bring mostly clear and sunny conditions, with little cloud cover. Southerly winds could become brisk in the western and northwestern parts of Transdanubia and strong around Sopron. After a relatively cool morning, with temperatures of 11-19 degrees Celsius, afternoon highs are forecast to reach 29-35 C.

Sunny, dry and hot weather is set to continue Thursday, with largely uninterrupted sunshine across most of the country. Southerly winds will be brisk in several areas and may occasionally become strong near Sopron. Temperatures are expected to rise further, ranging from 12-21 C in the morning and reaching 32-37 C in the afternoon.

Friday is also forecast to remain predominantly sunny, with little cloud and no significant precipitation expected. Southerly winds will generally remain moderate but may strengthen in the northwest.

Tropical nights are possible in several areas, while afternoon temperatures are forecast to climb to 34-39 C.