Authorities are warning that the Arsuf cliff in Herzliya is dangerous and should be avoided after a woman was seriously injured when part of the cliff edge fell suddenly last week, reports the Hebrew weekly Ha'ir-Tzomet Hasharon. Rescue officials say the heavy rains of two weeks ago have apparently weakened the cliff and it may crumble further. According to the report, the 26-year-old woman was walking with her boyfriend along the top of the cliff when its edge suddenly crumbled, sending her plummeting 20 meters to the beach amid a shower of boulders. The boyfriend called emergency services, who sent paramedics and firefighters to the scene. The rescuers had trouble reaching the woman because of the fear of further rock falls, but after a 90-minute struggle, she was rescued and taken to Ichilov Hospital in Tel Aviv. The coordinator of the Sharon Forum green party, Dror Ezra, warned residents to be careful in the area, saying the porous cliff walls are likely to crumble at any time, and especially after rainfalls. "Everyone should behave with caution (in the cliff area)," Ezra said. "This includes people walking on the beach below the cliff, because there is a danger of collapse after the rains."