I have just evacuated the James Center downtown due to an underground electrical fire. Smoke can seen billowing from the James Center's garage, and also from manholes a block away on Main Street in front of the Bank of America Center.
Update: The Richmond Times Dispatch has more information.
WWBT-12 has more coverage and so does WTVR-6. The fire is in underground tunnels and an underground power station and it isn't clear where it started or if it's completely out.