restore communications in ravaged Puerto Rico. Google parent company Alphabet offered to send its Wi-Fi balloons. They were among several tech companies proposing disaster response ideas, most aimed at getting phone and internet service up and running.

Some of these plans, of course, are more aspirational than others.

BATTERY POWER

Tesla CEO Elon Musk often takes to Twitter to mull over ideas, but on Friday his musings about sending his company's solar-powered batteries to help restore Puerto Rico's power attracted the attention of the island's governor.

"Let's talk," said Gov. Ricardo Rossello in a Friday tweet .

Musk agreed. Hours later, he announced he was delaying the unveiling of Tesla's new semi-truck and diverting resources, in part to "increase battery production for Puerto Rico and other affected areas."

The need for help in restoringand says it is working with local government, emergency responders and service providers to facilitate restoration and recovery efforts. The company, along with Microsoft and others, backs the NetHope consortium, which specializes in setting up post-disaster communication networks and has field teams now operating in Puerto Rico and several other Caribbean islands.

"Communication is critical during a disaster," Zuckerberg said after the hurricane hit, announcing that employees from his company's connectivity team—the same group working to build high-altitude drones that can beam internet service down to Earth—were heading to Puerto Rico. But with its aircraft still in the testing phase, the company said Friday that the engineers it's sent to Puerto Rico are focused on providing support to NetHope's teams.

SMALLER ORGANIZATIONS

Much of the ground work is being spearheaded by