Related Clues:

• Buckets down
• Comes down hard, maybe
• Showers or drizzles
• They're measured by pluviometers
• Brims
• ... sides reportedly, if it rains
• Rains heavily
• Bob Dylan "A Hard ___ a-Gonna Fall"
• Monsoon events
• Is a crowd
• Pours rain
• Drought enders
• Goes through a chain reaction
• Becomes overwhelming
• Drizzles, e.g