Category Nuances for heavy_rainfall:

• adverse,
• dangerous,
• inclement,
• weather,
• severe,
• extreme,
• related,
• meteorological,
• unusual,
• intense,
• hazardous,
• natural,
• abnormal,
• bad,

Simple Categories for heavy_rainfall:

• storm,
• hazard,
• phenomenon,
• weather,
• elements,