Hundreds of firefighters battled wildfires in Portugal and Greece on Sunday, with Spain and Italy sending reinforcements to help contain a massive blaze that's been burning for more than three days.

The fire in Vouzela is the main concern, with about 1,100 personnel on the ground. The blaze is still spreading as the country is under a red heat alert.

The wildfire in Vouzela is currently the main concern, with over 900 personnel on the ground. It has three active fronts and is still spreading as Portugal remains on red heat…