Recently there were moderate to heavy rains in certain parts of Tamilnadu but in certain other parts like in many places in Dharmapuri district there were no rains. Hewever, one could see clouds every day. There are general theories on how clouds are formed and how it rains.
Cloud seeding is done by many countries including India for inducing rainfall. Now what is required is research on reducing the cost of cloud seeding.
There is also need for research on rainfall when there are no clouds over the area where rain is desired. There should be research on moving rain bearing clouds from where ever they are to where ever rain is required. The cost should be affordable. There are generally more clouds over sea than over land and rain is more required over land than over sea. During day time winds blow from sea to land and vice-versa during night time. But this does not happen some times and rain bearing clouds are not moved by winds to land during day time. Now the research should be on moving clouds from over sea to land at affordable cost.If the cost is affordable, then the clouds can be moved also from places where the rain is causing floods to dry areas. Considering the amount of time,energy, money needed to mitigate the effects and contain damages of heavy floods, expenditure on research on moving clouds is worth spending.