Exodus 9:20 & 21

"Those officials of Pharaoh who feared the word of the Lord hurried to bring their slaves and their livestock inside. But those who ignored the word of the Lord left their slaves and livestock in the field." NIV translation

We see from this passage that some of the Egyptians believed the word of God and brought in their slaves and livestock while others refused. We are reminded that this was not an uninformed decision as they had the examples of the plagues that had already passed. 

This is a picture of what will happen in the last days. There will be all kinds of plagues and they will be visible to all. Each person will have to decide if they believe the word of God or not. Those that do can take shelter in Jesus while those that do not will be judged and the sentence will be death.