Friends! a lot of new Irma-oriented HOT OSM mapping tasks are up! Go map! It's cool if you've never done it before, there are instructions.
The key focus of most of these projects is just mapping residential roads and buildings so disaster responders can navigate and know what things *should* be on the ground (after a hurricane you might not be able to tell if a building used to be somewhere or not)
This one is flagged as good for new mappers – it's just building footprints. In the case of disaster mapping, you usually don't need to bother with mapping building shapes super accurately. Just the information that "hey there is a building here" is good enough. Drawing rectangles is a thing anybody can do!