August the 9th, 2026 – Croatia could end up facing natural gas problems this autumn, with underground natural gas storage facilities being filled poorly. As for natural gas prices, Grozdanić says that prices in the European Union have risen to a little over 60 eurps per megawatt-hour (MWh). natural gas is where the problems could ariseHowever, there could be problems with natural gas, Grozdanić notes. “The fact is that underground natural gas storage facilities are being filled poorly. As for natural gas prices, Grozdanić says that prices in the European Union have risen to a little over €60 per megawatt-hour (MWh).