About 23,500 of the 1.5 million customers that lost power in western North Carolina still lacked electricity on Sunday, according to Poweroutage.us. Without it, they can’t keep medicines cold or power medical equipment or pump well water. They can’t recharge their phones or apply for federal disaster aid.

The Footprint Project is scaling up its response to this disaster with sustainable mobile infrastructure. It has deployed dozens of larger solar microgrids, solar generators and machines that can pull water from the air to 33 sites so far, along with dozens of smaller portable batteries.

With donations from solar equipment and installation companies as well as equipment purchased through donated funds, the nonprofit is sourcing hundreds more small batteries and dozens of other larger systems and even industrial-scale solar generators known as “Dragon Wings.”