What conditions allow for optional fasting beyond the thirteen prescribed rain fasts?

HanukkahPesachYom Tov Laws

Synopsis

Additional fasting for rain may occur under specific circumstances: continued water shortages requiring rain at any season, interruptions in rainfall lasting forty days during the rainy season, or rain needed for specific crops or water storage during harvest/Sukkot seasons.

Early Acharonim
Lenient
Strict
Lesser cited
Major authority

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