The Office of Homeland Security coordinates with federal, state and
local counter-terrorism efforts. This office works with state and
local governments on detection, preparedness, prevention, response,
recovery and incident management.
A Texas Task Force is charged with assessing the ability of state
and local government agencies to respond to threats and to effectively
provide victims assistance and aid coordination.
The Office of Homeland Security uses a five-level system of threat
conditions to measure the risk of terrorist attack. Threat conditions
may be assigned for the entire nation or they may be established for a
particular geographic area or industrial sector. At all times, the
public is encouraged to remain prepared.
For current nationwide threat levels, visit the
United
States Office of Homeland Security web site
and monitor local and national news reports.
Want more information? Check out these
web sites
The Homeland Advisory System

Severe Condition (Red) Declared
when there is a severe risk of terrorist attack. Federal
departments and local agencies may assign emergency response personnel
and mobilize specially trained teams or resources, monitor, redirect
or constrain transportation systems and or close public and government
facilities.
High Condition (Orange) Declared
when there is a high risk of terrorist attack. Federal
departments and local agencies may take additional precautions at
public events and possibly consider alternative venues or even
cancellations or restrict threatened facility access to essential
personnel only.
Elevated Condition (Yellow)
Declared when there is a significant risk of terrorist attack.
Guarded Condition (Blue)
Declared when there is a general risk of terrorist attack.
Low Condition (Green) Declared
when there is a low risk of terrorist attack.
Possible Disasters That Threaten Life and Property
The City of Arlington Hazard Mitigation Plan identifies the following
high-risk incidents:
Tornado Severe thunderstorm
Flooding Terrorism Hazardous material incident
Winter ice storm Wildfire
Mass casualty incident Drought