The heat signature from the dragon was an indication that it was going to blast something and the System using the Floating Sky System surveillance had managed to predict the following places it would hit.
The algorithm was somehow injected into the Floating Sky Station's live feed since there was no time to explain or give excuses when that huge fiery ball of flames aimed for. The moment it emerged on the possible paths of attack, Jin and the Central Defence Officers alerted the respective pilots who were still in the air.
And one of them with the highest percentage that would be hit was undoubtedly the helicarrier. "Cloudie maximise the shield modules NOW!" Jin shouted and Cloudie did as he was told but they knew that if the Mecha Fire Dragon could obliterate half a mansion with its breath, what were the chances of the helicarrier surviving even with its shield at the maximum capacity?