Final answer:
The storm will inundate low-lying areas, meaning they will be flooded with water. This question is about the impact of a storm on geographical areas.
Step-by-step explanation:
The storm will inundate low-lying areas, with 4 million people at risk of flooding. Inundate means to flood or overflow with water, and in this context, it indicates that the storm will cause the low-lying areas to be submerged in water. The phrase 'low-lying areas' refers to geographical locations that are at a lower elevation, such as coastal areas.
This question is related to Geography as it discusses the impact of the storm on specific geographical areas. The grade level for this question is High School as it requires knowledge of vocabulary and understanding of the concept.