Flood Alarm (for flood water)

PLEASE could it be investigated if an algorithm could be implemented for the cameras to detect approaching flood water near a property. I'm sure the slow (or rapid!) approach of a large glimmering/reflective surface towards the property could be identified, and therefore an alert/warning triggered. 1 in 6 houses in UK at risk of either surface water (heavy rainfall) or river flooding, so this feature would help loads of people protect their homes, by giving them the chance to move valuables upstairs, move their car, or even install temporary flood defences if they have them! Please and thank you! :-)