While the colonist were farming, a big storm came. It they saw it coming but it was far to big for them to actually build strong enough structures. The storm lasted for 3 hours many of there houses were blown away by the ferocious.
The colonists were fighting the storm head on however, they had to survive 3 hours. once they had beaten the storm they had stepped out side to inspect the damage. thats when it happened they saw it the mighty waves. The storm surge had started and they wernt ready for it. 85% of the colony had died and the remaining found the native americans and left with them.
as you may already know the only 15% of the colony survives. due to rain and flooding the colony dies from drowning and hunger. about 2 days go by only 15% of the colony is still alive, the natives come and ask them to join there village. having no other choice they agree to join there village.(just want to let you know this is the theory talking not the narrator.) It makes sense that they may have joined the Croatoan because they may have had no where else to go. Think about it there's no shelter there's no food they had nothing to loose only to gain.