 In the days leading up to Hurricane Katrina, 500+ buses were sitting in school district parking lots and municipal bus yards, some less than a mile from the Superdome.
<clarity>  In the days leading up to Hurricane Katrina, 500+ buses were sitting in school district parking lots and municipal bus yards, some less than a mile from the Superdome.
 In the days leading up to Hurricane Katrina, 500+ buses were sitting in bus yards, some less than a mile from the Superdome.