Tilly became aware of the upcoming calamity by video on tsunami.

Tilly became aware of the upcoming calamity through a video on tsunamis. The video provided her with valuable information about the signs and warnings of a tsunami, allowing her to recognize the impending danger.

Video on Tsunami:
Tilly came across a video that specifically discussed tsunamis. This video likely explained what tsunamis are, how they are formed, and the potential devastation they can cause. It may have also included information about the warning signs and how to respond in case of an approaching tsunami.

Awareness of Impending Calamity:
As Tilly watched the video, she gained knowledge about the signs and warnings of a tsunami. Some of the key points she may have learned include:

1. Earthquakes: Tsunamis are often triggered by undersea earthquakes. The video might have emphasized that if she feels an earthquake, especially one that lasts for an extended period or is particularly strong, it could be a warning sign of an impending tsunami.

2. Receding Water: The video might have mentioned that if she notices the ocean or other bodies of water suddenly receding or pulling back, it could indicate that a tsunami is approaching. The sudden withdrawal of water is caused by the incoming wave drawing water away from the shore.

3. Unusual Animal Behavior: Another warning sign highlighted in the video might have been unusual animal behavior, such as birds flying away or animals behaving erratically. This is because animals have a heightened sense of danger and can often sense the impending calamity before humans.

4. Official Warnings: The video might have emphasized the importance of paying attention to official warnings and evacuation orders issued by local authorities. These warnings can provide crucial information about the expected time, intensity, and impact of the tsunami.

By watching the video, Tilly became aware of these warning signs and was able to recognize the impending calamity. This knowledge allowed her to take appropriate actions to ensure her safety and the safety of those around her.

How did tilly become aware of the upcoming calamity