A short term solution is to install a power generators which can use both natural gas and MDO since there is a shortage of natural gas they might switch to (Diesel) MDO.And when the production of gas improves, and then they might change over to Natural gas.
The second fast alterative short term solution is to hire a Power generating Barge which can be towed to the port Of Dar from overseas that might take from 14 days to 30 days to arrive in Dar port, The barge will connect its terminal to our grid, no installation of plant is required, since it will be berthed in port.