1. A method for wireless communications, comprising: receiving, at a user equipment (UE), control information comprising a group of transmit power control (TPC) commands; determining, based on a plurality of TPC indices, one or more TPC commands from the group to use for adjusting power of uplink transmissions on a corresponding plurality of component carriers; and adjusting a transmit power of one or more of the plurality of component carriers in accordance with the determined TPC commands.