The Homeland Security Department plans to refine its terror alert system.
It hopes to give state and local governments more guidance on how to react to increases in the alert status. Meetings with state and local officials are set for next month.
State and local governments have complained that the threat information they get is too vague, leaving police and other authorities unsure how to respond.
A spokesman for Homeland Security says the threshold for raising the alert level is higher than it used to be. He says it would take a greater threat to raise the level from the current yellow to orange.