Why does our internet go out anytime it rains?

Our Cox high-speed internet cuts out every time it rains. Even in a slight drizzle it’ll slow down to the point where I can’t conduct a Zoom meeting, which is a major problem because I work from home and my employer is 2,500 miles away. Needless to say, we can’t stream our TV shows either. Is there a node or hub somewhere near us that’s not properly protected from the elements or something?