For anyone who is interested in helping increase the ability of first responders and folks on the ground to better respond to events like this, consider building tech and startups that aid in volunteer management and distribution, communication systems when power and cell towers are down, logistics networks to get supplies to places in need. Much of this stuff is not innovative tech, someone just has to care to retrofit solutions that exist already to the needs of these scenarios. Heck, the Red Cross volunteer signup page is just a wufoo form. So much can be automated and modernized.
Made a simple site with some resources on where to donate money/goods: prmaria.com
Disclaimer: Living in San Juan and hearing reports from the ground