Disabled rights advocates are suing the city of Los Angeles, contending special-needs residents have been overlooked in its disaster response plan. The class-action lawsuit was filed by nonprofits Disability Rights Advocates and the Disability Rights Legal Center. It says hurricanes Katrina and Rita in the South underscored the fact that special needs residents are among the most vulnerable groups when emergencies strike.The groups want the city to create a voluntary registry that would alert rescue workers to disabled people living alone, and provide instructions on where they can be taken in the event of a disaster.