Under a public-private partnership arrangement lasting 27 years, water will be taken from the Nyabarongo River and treated for use in the capital Kigali.
The fund provides working capital to small businesses focusing on agricultural commodities, energy and metals, a segment often neglected by Islamic lenders.
The strike are aimed at stopping the Houthis from taking more territory and pressing them to negotiate a power-sharing deal with President Abd-Rabbu Mansour Hadi.