This is the 315th most frequent French word.
hausse
Increase; rise; upward trend.
In this case, "hausse" is used to describe an increase in a measurable value, specifically temperature.
La hausse des températures inquiète beaucoup les météorologues.
The rise in temperatures worries many meteorologists.
This sentence uses "hausse" in a figurative way to describe an increase in an abstract concept, such as popularity.
Une hausse de popularité peut être néfaste si elle est trop soudaine.
A rise in popularity can be harmful if it is too sudden.
Here, "hausse" refers to an increase or rise in numerical terms.