| high alert | 39.43 | America is on high alert. | ||
| full alert | 11.52 | All ships were on full alert. | ||
| heightened alert | 8.23 | Police will be on heightened alert. | ||
| red alert | 6.98 | Staff on red alert. | ||
| general alert | 5.79 | State radio announced a general alert. | ||
| maximum alert | 5.20 | US Marines went on maximum alert. | ||
| highest alert | 2.17 | Law enforcement agencies on highest alert. | ||
| nationwide alert | 2.17 | The armed forces were on nationwide alert. | ||
| special alert | 1.97 | No French units are currently on special alert. | ||
| military alert | 1.58 | South Korea considers heightened military alert. | ||
| false alert | 1.38 | That, too, was a false alert. | ||
| tactical alert | 1.38 | Police have been put on tactical alert in case of any disturbances. | ||
| terrorist alert | 1.32 | On the basis of that information, the FBI has issued terrorist alerts over the past week. | ||
| higher alert | 1.25 | Soldiers have been placed on higher alert along the Albanian-Kosovo border. | ||
| top alert | 1.12 | Moscow police declared a top alert, but there were no reports of arrests. | ||
| orange alert | 0.99 | Orange alert means that personnel can be mobilised anytime. | ||
| emergency alert | 0.92 | Police in Tokyo were placed on emergency alert. | ||
| first alert | 0.92 | The first alert for contenders. | ||
| new alert | 0.86 | Bush spoke on a day of heightened tension from new alerts. | ||
| constant alert | 0.66 | He told the border guards they must be on constant alert. |