The rest of the country will be under a yellow code alert for heat, with temperatures exceeding 35 degrees Celsius.
The counties targeted by the orange code are Satu Mare, Bihor, Arad, Alba, Hunedoara, Timis, Caras-Severin, Mehedinti and Dolj.
According to weather authorities, the heat index, which combines air temperature and relative humidity to determine the felt air temperature, will exceed the critical threshold of 80.