Authorities urged residents in parts of Thessaloniki, Greece’s second-largest city, to remain indoors and keep their windows and doors closed due to toxic smoke from a burning recycling plant engulfed by a wildfire.

Another major wildfire broke out Sunday afternoon west of the Greek capital, Athens. The fire department said 210 firefighters, backed up by volunteers, specialized teams and 29 aircraft, including water-dropping planes and helicopters, were deployed to battle the blaze burning through pine forest in the Mandra area. Authorities were racing to contain the blaze before nightfall, when aircraft can no longer perform firefighting operations.

In central Portugal’s Vouzela area, more than 1,200 firefighters backed up by nearly 400 vehicles and 15 aircraft tried to put out a blaze that broke out Thursday, according to the Civil Protection authority.

The wildfire had burned across an area of 12,000 hectares (30,000 acres) by Sunday, information from the European Union’s Copernicus satellite mapping agency showed.

The EU Civil Protection and Humanitarian Aid said Spain deployed 120 firefighters and 45 vehicles to reinforce efforts in Portugal on Friday, while three firefighting aircraft from Italy and Spain were also sent to help.