During a new or full moon
Step-by-step explanation:
This is because, during these lunar phases, there is a spring tide – during high tides. Therefore because the ocean water-levels are high, storm surges push more water towards the coast leading to more destruction. Remember a storm surge is the pushing of water towards the coastline by strong cyclonic winds. A combination of astronomical tide and a storm surge is called a storm tide and is the most destructive.