I am currently registered to vote in Fort Bend County. What do I need to do if I now live in Harris county?

You need to re-register in Harris county.

You can pick up a voter registration card at any Harris county tax office (http://www.tax.co.harris.tx.us/locations/locations.asp), most Texas Department of Public Safety (Drivers License) offices, most public libraries or you can download a copy from the web at: http://www.tax.co.harris.tx.us/voter/voterapp/acquirevoterapp.asp

The October 6th deadline is rapidly approaching, so don't delay.