JERUSALEM — Several countries were sending firefighting aircraft to Israel on Thursday as crews battled for a second day to extinguish a wildfire that had shut down a major highway linking Tel Aviv and Jerusalem and sent drivers scrambling from their cars.

The fire broke out around midday on Wednesday, fueled by hot, dry conditions and fanned by strong winds that quickly whipped up the flames burning through a pine forest. Several communities were evacuated as a precaution as the smoke turned the skies over Jerusalem gray.

Israel’s Fire and Rescue Services warned the public to stay away from parks or forests, and to be exceptionally careful while lighting barbecues. Thursday is Israel’s Independence Day, which is typically marked with large family cookouts in parks and forests.

At least 12 people were treated in hospitals on Wednesday, mainly due to smoke inhalation, while another 10 people were treated in the field, Magen David Adom Ambulance services said.

Italy, Croatia, Spain, France and Romania were sending planes to help battle the flames, while several other countries, including North Macedonia and Cyprus, were also sending water-dropping aircraft. Israeli authorities said 10 firefighting planes were operating on Thursday morning, with another eight aircraft to arrive during the course of the day.

The main highway linking Jerusalem to Tel Aviv was opened again on Thursday, a day after the flames had encroached on the road, forcing drivers to abandon their cars and flee in terror. On Thursday morning, broad swathes of burned areas were visible from the highway, while pink anti-flame retardant dusted the top of burned trees and bushes. Smoke and the smell of fire hung heavy in the air.

In 2010, a massive forest fire burned for four days on northern Israel’s Mount Carmel, claiming 44 lives and destroying around 12,000 acres, much of it woodland.