Influx (noun)

1. A large number of people or things coming or arriving in a place at the same time.
2. A flowing in of something, especially a fluid or gas.

Origin:

Late 16th century: from latin influxus, from influere "flow in".

Examples:

1. An influx of refugees has put a strain on the country's resources.
2. There has been an influx of tourists to the city this summer.
3. An influx of water from the broken pipe flooded the basement.
4. The influx of new technologies has led to rapid advancements in the field.
5. The influx of capital helped the company to expand rapidly.