Containers are well known for their durability, adaptability, light weight, low cost and ease of stacking, creating a recycling trend that we're feeding off of.
You can make them properly insulated, they can make a warm and comfortable home in the winter and a cooler home in the summer.
Since they were originally built for transportation, they can be easily moved when they're needed.
Well anchored, they can withstand winds of up to over 280 Kilometers per hour. You can also rest assured that your container house will never collapse in an earthquake. By far, this material is the safest rain shelter by far.