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

Authorities urged residents in parts of Thessaloniki, Greece’s second largest city, to remain indoors and shut their windows and doors due to toxic smoke from a burning recycling plant that was 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.

The ripple effects from the Iran war will continue long after the shooting stops, threatening farmers, harvests and families worldwide.