Ruling on organizing prayers for rain if this is not done by the ruler - Click- http://aydnajimudeen.blogspot.com/ for detail|-

If the ruler of a state is neglecting the Sunnah of praying for rain
(salaat al-istisqaa'), and he does not call the people to offer this
prayer when there is no rain or the wells have dried up, is it
permissible for the imaam of one of the mosques in that country to
call the people of his city to offer the prayer for rain and for them
to go out on their own to offer this prayer?
Praise be to Allaah.
If the people of a city arenot ordered by their ruler to offer the Eid
prayers or prayers for rain, then it is prescribedfor them to offer
the Eid prayer and prayers for rain in the desert (i.e., outside the
city) if that ispossible, or else in the mosques, because the
Messenger (peace and blessings of Allaah be upon him) prescribed that
for his ummah. Eid prayer is fard kafaayah (i.e., if some members of
the community undertake this duty, the rest are free from blame,but if
no one does it, all will be held to blame), soit is not permissible
for the Muslims in any city toneglect it. Some of the scholars said
that it is fard 'ayn (an individual obligation) like Jumu'ah prayers,
because the Messenger of Allaah (peace and blessings of Allaah be upon
him) did it and ordered others to do it.
Kitaab Majmoo' Fataawa wa Maqaalaat Mutanawwi'ah li Samaahat al-Shaykh
'Abd al-'Azeez ibn 'Abd-Allaah ibn Baaz (may Allaah have mercy on
him), vol. 13, p. 85G

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