Wildfires could engulf 'all of Europe' within days, the EU's emergency response chief warned on Wednesday, as two firefighters were killed battling a blaze in Greece and infernos continued to rage across France, Spain and Portugal.Greece, Italy and Central Europe are now expected to face the highest wildfire risk in the coming weeks, raising fears of fresh disasters even as firefighters continue battling major blazes across southern Europe.Maria Zuber, head of the EU's Emergency Response Co-ordination Centre, said the next few days would be 'very difficult' and warned the wildfire threat was shifting eastwards after devastating parts of France and the Iberian Peninsula.'The next risk, it's already moving to Greece and also Central Europe,' Ms Zuber told reporters. 'Greece for the moment was spared, and now we see that it will go to Greece. 'Italy will face risk at the beginning of August, and we will need to see what will happen with the Iberian Peninsula, because if (it is) there as well, we will have all Europe on fire.'The forecast reflects weather conditions that help fires ignite and spread rapidly, such as high temperatures, dry air, wind and a lack of rain.Europe suffered its worst wildfire season on record last year, with more than a million hectares of land burned. Ms Zuber said Europe's fire situation this year so far was similar.'We have the potential that this is another record,' Ms Zuber said.