Simplify the following text for a Grade 5 native English-speaking person.
Original: After almost dissipating on August 10 , Irene peaked as a Category 2 hurricane on August 16 before being absorbed by a larger extratropical system late on August 18 .
Simplified: The storm almost died out on August 10 , but it gained back its strength . Irene reached Category 2 hurricane strength on August 16 .