Simplify the following text for a Grade 14 native English-speaking person.
Original: Partly due to this bulletin , people in southeastern Louisiana and southern Mississippi , those most affected by the storm 's impact , followed evacuation orders more closely , resulting in a reduced casualty toll .
Simplified: Partly due to this bulletin , people in southeastern Louisiana and southern Mississippi , those most affected by the storm 's impact , followed evacuation orders more closely , resulting in a reduced fatality number .