Homes and cars were damaged, and 300 students were evacuated from a school in Talmon, an Israel settlement in the occupied West Bank, police said.
Firefighters have been battling fires in several locations since Tuesday and forecasters are warning that the dry conditions and strong winds are likely to continue until early next week.
Several countries - including Cyprus, Russia, Italy, Croatia and Greece - have sent help and equipment, including aircraft, to help tackle the blazes.
Mr Netanyahu said officials were also contacting the US company which operates a huge firefighting plane known as the "Supertanker".
In 2010, 44 people died in a fire on Mount Carmel, just south of Haifa.