influx

An influx is a sudden or large amount of something arriving at one place.

When we talk about an influx, it's usually referring to people or things coming into an area all at once. For example, if there's been a big storm, you might hear that the hospital has seen an influx of patients. This means they're getting a lot of new cases all at once, and maybe even more than usual. It could also be used for other kinds of things like traffic or supplies – imagine a city getting an influx of tourists during a festival season.