The book of Genesis was written in the Near Eastern IRON Age, and the Hebrews were worshipping an erupting volcano while they were “in the wilderness” (Exodus 19: 16-19;)
16 On the morning of the third day there was thunder and lightning, with a thick cloud over the mountain, and a very loud trumpet blast. Everyone in the camp trembled. 17 Then Moses led the people out of the camp to meet with God, and they stood at the foot of the mountain. 18 Mount Sinai was covered with smoke, because the Lord descended on it in fire. The smoke billowed up from it like smoke from a furnace, and the whole mountain[a] trembled violently. 19 As the sound of the trumpet grew louder and louder, Moses spoke and the voice of God answered him.[b]
Some have said the volcanic mountain was in Saudia Arabia. Also, there was no way they could have fled from the Egyptians because the Egyptians were already in Israel, having occupied it for over a hundred years!