Smartphone user? What will you do when disaster strikes, cellular networks collapse, and electricity supplies fail?
The hurricane season has levelled islands across the Caribbean, including the US territory of Puerto Rico.
People living across the region have seen electricity cut and cellular communications wiped out. Some islands have seen almost every man-made structure flattened. Many have lost lives, many have lost relatives and many more have lost everything they own.
Those who remain in the afflicted regions will be waiting months, perhaps years, for things we take for granted to be restored: electricity, running water, cellular communications, almost every shred of infrastructure.