NEW ORLEANS (AP) — New Orleans would like to return the favor to Houston. Mayor Ray Nagin says anyone evacuating the Houston area in anticipation of Hurricane Ike is welcome in New Orleans. Houston set up shelters — including opening the Astrodome — to New Orleans residents fleeing Hurricane Katrina in 2005. Thousands of people went to Houston, many staying there for months or even years after Katrina. No shelters have been opened in New Orleans. But Nagin says there are 13,000 to 15,000 available hotel rooms.