Simplify the following text for a Grade 10 native English-speaking person.
Original: Since Hurricane Katrina made landfall in August 2005 , the term has been used to describe temporary housing sites set up for Gulf Coast residents who were left homeless by the storm .
Simplified: Since Hurricane Katrina made landfall in August of 2005 , the term has been used to describe temporary housing sites set up for Gulf Coast residents who were left homeless by the storm .