We live in an age lashed by natural disasters. Katrina obviously looms in the American mind, but the Sichuan Earthquake and the Indian Ocean tsunami have all imprinted themselves on an entire generation, worldwide. What could we have done differently, before disaster struck, to prevent such loss? What could we have done better? Designers have been noodling on ways to meet the challenge. It's worth taking a step back and surveying the basic design strategies they've come up with. 

As New Scientist reports, recent hurricanes have proven the mettle of rounded buildings. Because of their shape, they create less drag than rectangular buildings and up to 30% less pressure on the outside walls.

In the case of these homes by Deltec, the spoke-like form of the floor and roof trusses distributes outside forces evenly throughout the structure: 

In 2005, this Deltec house managed to escape Hurricane Dennis nearly unscathed, while neighboring designs were blown to bits

Meanwhile, seafront property poses another challenge: Waterfront property will probably always be valuable, even as global warming completely remakes coastlines. The solution: floating houses. Of course, the Dutch are experts at floating design, since so much of their country lies right at sea level. As New Scientist notes, Waterstudio specializes in floating houses:

They've even been commissioned to build a floating mosque in Dubai. (Read more about avant-garde mosque design here):

A little bit inland, where floating houses aren't an option, the solution of course is to loft the house. But that creates its own challenge: How do you design a lofted building that doesn't look terrible, that can blend in easily with neighboring homes? Dwell recently held a student contest to design concept homes for Louisianans, and several tackled the stilt problem head on. This design, by Thomas Colosino and David Lachin of LSU, solves it admirably: 

The last solution is to build structures that are both more resilient and less permanent. It's also one of the oldest: For hundreds of years, the Japenese constructed entire cities whose buildings were made of just wood, bamboo, and paper. The purpose was two-fold: To create airy, easy to escape buildings less likely to topple and kill their inhabitants; and to make sure that even in the worst disasters, those buildings could be quickly replaced. Those strategies are being revived in Sichuan, in particular. 

Maybe the greatest design problem during the earthquake was concrete--which in China's quick-build, lightly regulated economy is frequently shoddy and prone to collapse. China, in a way, had no choice: Many regions have been deforested. Yan Xiao, a professor of engineering at USC has conceived of a way around that, by creating a new, plywood-like material made of bamboo, which is ubiquitous in China:

[Image via Pop Sci]

"Glubam" can be used in resilient timber-style buildings--a rarity in China. Using Glubam, Xiao has built dozens of schoolhouses and homes across the area. 

Shigeru Ban, a legendary Japanese architect, is thinking along similar lines, but he's resuscitating the Japanese practice of architecture made from paper. Ban has experimented with paper for years, but the disasters have refocused attention on the practice, and he recently produced a school house made of paper: 

[Images via Zhu Tao]