More than 70 wildfires have broken out across Greece since Friday morning.
Fire official Vassilis Vathrakogiannis stated that 51 new fires broke out and teams are fighting a total of 73 forest fires.
Vathrakogiannis stated that most fires have spread to the Greek mainland, concentrating in the Athens region and the nearby Viotia region.
Blazes near Athens and Viotia
The largest blaze is burning near the seaside town of Porto Germeno, approximately 70 kilometres northwest of Athens in the Viotia region.
A fire department spokesman told the French AFP news agency that the fire has reached the sea and homes have been damaged.
Local media reported that several homes were destroyed and a fire engine was completely burned during the wildfires.
Authorities used Greece's 112 emergency warning system to order evacuations from Porto Germeno, Psatha, and Mytikas.
Twelve people were rescued by boat overnight during the wildfires.
Firefighting aircraft resumed water drops near Porto Germeno after crews battled the flames throughout the night.
A wildfire on Mount Poikilo on the western outskirts of Athens reached the edge of the Haidari suburb and approached the Daphni Psychiatric Hospital.
Seventeen patients were evacuated from the Daphni Psychiatric Hospital as a precaution.
Impact on Crete and other regions
Wildfires on the island of Crete have affected approximately 5,000 hectares.
In the Rethymno region near Preveli, wildfires affected approximately 760 hectares, while wildfires on Paros Island affected approximately 975 hectares.
Satellite data from the European Forest Fire Information System (EFFIS) estimated that wildfires in the Rethymno region of southern Crete and on Paros Island have affected more than 5,700 hectares.
As of Thursday, a wildfire in the Melabes region of Rethymno, Crete, was estimated to have affected over 4,000 hectares.
Conditions improved in the Rethymno region on the island of Crete.
A wildfire also broke out near the coastal village of Agios Vasileios.
Firefighters continued to battle a wildfire in the northwestern Peloponnese.
Response and environmental impact
Firefighters lost their lives due to the wildfires in Greece.
The National Observatory of Athens weather service recorded winds up to 130 kilometres per hour on Saturday.
The Greek fire brigade is at the maximum level of alert, warning of high fire risk in the Attica peninsula and the island of Evia.
Greek Prime Minister Kyriakos Mitsotakis visited the Civil Protection crisis coordination center on Saturday.
Bloomberg Athens Deputy Bureau Chief Paul Tugwell stated that Greece's wildfire response is under severe strain due to gale-force winds, dry conditions, and difficult terrain.
Tugwell also stated that climate change extends the wildfire season and raises concerns regarding long-term economic and insurance costs.
The damage to the Porto Germeno area was 'inconceivable'.
The environmental damage is huge.
European Union countries are coordinating firefighting resources across borders.