The phrase 'heightened threat' is correct and usable in written English.
You can use it to describe a situation in which someone or something poses a greater risk than usual. For example, "The government is warning of a heightened threat of terrorist attacks this holiday season."
The reason New York City does not have an active Citizen Corps Council, it seems, is that neither patriotic fervor, nor wartime -- nor even heightened threat levels -- can stay government from its glacial pace.
Dave Rich, deputy director of communications at the Community Security Trust, said: "We are not aware of any specific heightened threat or any specific extra measures being taken, but it is obviously a time of increased concern for parents, which is why we wrote to them".
Mr. Blunkett has said he believes Britain faces heightened threat because of its close alliance with the United States and has warned the capital to be wary of a strike on the city's subway system or a "devastating" attack employing nuclear, biological or chemical weapons.
"The negative [springtime] NAO is an indicator that the U.S. will have a heightened threat this year," Elsner said.
Heightened risk The onset of the rainy season in much of South Sudan brings with it the heightened threat of malaria – one of the major killer diseases among children under 5 years old.
Congressional committees have also been briefed on the heightened threat levels.
"During periods of heightened threat, we undertook smart, disciplined actions," Mr. Tenet said.
Rather, he based the decision on Europe's accelerating growth and a heightened threat of inflation.
12, advises Americans to defer visiting there because of "a heightened threat of terrorist incidents," including terrorist bombings.
It comes as the Foreign Office urged Britons travelling abroad to be "vigilant" because of a "heightened threat of terrorist attack globally against UK interests and British nationals".
