Eighteen other counties in eastern, south-eastern and western Romania will be under a yellow code alert for heat in the same timeframe.
The orange code alert targets Bucharest and counties Ilfov, Prahova, Dabovita, Giurgiu, Teleorman, Arges, Valcea, Olt, Gorj, Dolj and Mehedinti.
The yellow code warning targets counties Bihor, Arad, Timis, Caraș-Severin, Hunedoara, Alba, Calarasi, Ialomita, Constanta, Tulcea, Braila, Buzau, Vrancea, Galati, Bacau, Vaslui, Iasi and Borosani, where temperatures are expected to reach 37-38 degrees Celsius.
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.