| Text | Length |
| Red-flag | 8 |
| Red follower | 12 |
| Red flag, e.g. | 14 |
| Red chaser | 10 |
| Ready to jump, perhaps | 22 |
| Ready for whatever | 18 |
| Ready for shows | 15 |
| Readiness condition | 19 |
| Raid warning | 12 |
| Put on the ready | 16 |
| Percipient | 10 |
| On the ready | 12 |
| On edge? | 8 |
| Offer a heads-up | 16 |
| Not foggy-headed | 16 |
| Not easy to fool | 16 |
| Not easily fooled | 17 |
| Not caught napping | 18 |
| More than just awake | 20 |
| Make wary | 9 |
| Make buddy aware of show | 24 |
| Like prairie dogs, notably | 26 |
| Like good guards | 16 |
| Like an excellent guard dog | 27 |
| Like a worthy watchdog | 22 |
| Like a watchdog | 15 |
| Like a guard dog | 16 |
| Like a good base-runner | 23 |
| Keeping one's radar up | 26 |
| Keen-eyed | 9 |
| It's high when it's red | 31 |
| Inform, in a way | 16 |
| Fully awake | 11 |
| Full of NoDoz | 13 |
| Flag down, say | 14 |
| Fit for guard duty | 18 |
| Early warning | 13 |
| Danger notice | 13 |
| Colorful warning, often | 23 |
| Cell phone beep | 15 |
| Caffeinated? | 12 |
| Bushy-tailed? | 13 |
| Bring to the attention of | 25 |
| Bring to someone's attention | 32 |
| Bright eyed and bushy tailed | 28 |
| Bit of Weather Channel news | 27 |
| APB, for one | 12 |
| Antarctic base | 14 |
| All points bulletin | 19 |
| Air-raid signal | 15 |
| A serious one may be red | 24 |
| "Look out below!," e.g. | 33 |
| "Heads up!," e.g. | 27 |
| ''Heads up!'' e.g. | 34 |
| Warned | 6 |
| Given advance notice | 20 |
| Tipped off | 10 |
| Signaled | 8 |
| Flagged | 7 |
| Aroused | 7 |
| Gave a warning | 14 |
| Cautioned | 9 |
| Notified | 8 |
| Sounded the alarm | 17 |
| Made aware | 10 |
| Gave a heads-up to | 18 |
| Gave a heads-up | 15 |
| Forewarned | 10 |
| Sent smoke signals, maybe | 25 |
| Sent signals to | 15 |
| Put on the qui vive | 19 |
| Made aware of | 13 |
| Given a tip | 11 |
| Paul Revere, for one | 20 |
| More watchful | 13 |
| More attentive | 14 |
| Revere, once | 12 |
| One warning | 11 |
| More vigilant | 13 |
| More observant | 14 |
| Less sleepy | 11 |
| Most wide-awake | 15 |
| Most on one's guard | 23 |
| Best way to drive | 17 |
| With vigilance | 14 |
| With awareness | 14 |
| In a wary way | 13 |
| With quick awareness | 20 |
| With ears pricked up | 20 |
| With attentiveness | 18 |
| In nimble fashion | 17 |
| In a wide-awake manner | 22 |
| In a heads-up manner | 20 |
| In a completely awake way | 25 |
| Computer reminders | 18 |
| Tips | 4 |
| Tips off | 8 |
| Warns | 5 |
| Warning signs | 13 |
| Sirens | 6 |
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