These giant, spiraling tropical storms can pack wind speeds of over 160 miles (257 kilometers) an hour and unleash more than 2.4 trillion gallons (9 trillion liters) of rain a day. The most infamous tsunami of modern times hit Indian Ocean shorelines on the day after Christmas 2004.
Catch a glimpse of wildfires from a rare perspective, as firefighters open a window into their world.
Unlike earthquakes, which are often followed by aftershocks, the storms that birth tornadoes are independent of one another. See heroic firefighters and breathtaking devastation shared with the #wildfire2014 tag on Your Shot. Twisters across much of the South and Midwest highlight seasonal dangers in vast strike zone. See how you measure up against others, and how changes at home could do tons to protect the planet. The National Geographic Society aims to be an international leader for global conservation and environmental sustainability.
More than five-and-a-half million properties in England and Wales are deemed to be at risk from flooding. It is impossible to guarantee that flood-water will not enter your property, even if you have taken steps to protect your property. George Osborne does a U-turn on cuts to tax credits and vows to protect police funding in his Spending Review. Flood, earthquake, expansive soil, hurricane, landslide and subsidence damage is often not covered! One day I received an updated policy from my insurance company in the mail and I decided to spend a little time reading. I wanted to find out if my policy would cover the same disasters that I saw other people suffering.
Your homeowners insurance probably does not cover half of the things that you assumed it would. In my opinion, the "all perils" name is misleading because the coverage excludes so many different types of losses that commonly occur. Below I have done my best to summarize what many homeowners policies do not cover and provide links to more detailed information. There are certain areas of the United States where expansive soils are beneath much of the land. The map at right shows the geographic variability of earthquake hazard in the conterminous United States.
According to the National Flood Insurance Program, floods are America's #1 natural disaster. Mine subsidence occurs where coal or another mineral resource has been removed below the surface.


The area where I live is entirely underlain by the Pittsburgh Coal, which was mined out decades ago. Ant Hill Garnets are tiny garnets that ants haul to the surface and discard on their anthill. Flooding is one of the most common disasters that is not covered by the typical homeowners insurance policy. A portion of the author's homeowners insurance policy that excludes the most common geologic hazards (underlined in red). Over 50 percent of these areas are underlain by soils with abundant clays of high swelling potential. Less than 50 percent of these areas are underlain by soils with clays of high swelling potential. Over 50 percent of these areas are underlain by soils with abundant clays of slight to moderate swelling potential. Less than 50 percent of these areas are underlain by soils with abundant clays of slight to moderate swelling potential. Probabilistic seismic hazard maps have been prepared for the United States by the United States Geological Survey.
Map of relative landslide incidence and susceptibility across the conterminous United States. Sign warning motorists of subsidence hazard was erected after an earth fissure damaged a road in Pima County, Arizona (left). Map of areas underlain by water-soluble rock units such as carbonates, sulfates and halides with the potential to produce karst features. Any place where rain falls is vulnerable, although rain is not the only impetus for flood.A flood occurs when water overflows or inundates land that's normally dry. When individuals pledge to use less water in their own lives, our partners carry out restoration work in the Colorado River Basin. The Environment Agency lists two ways that homes and businesses can protect properties: "flood resistance" measures, and making a building "flood resilient". The list of exclusions was almost identical to the table of contents of an environmental geology textbook. Many homeowners never learn about these exclusions until after they have paid premiums for many years and then suffer an uncovered loss. More detailed learning for these topics can be obtained by reading an environmental geology book or taking an environmental geology course at a university. If I lived in these areas I would buy the insurance for my residence and for a commercial building if I owned one. In these areas the water aquifer or oil reservoir begins to compact and that compaction results in subsidence or fissuring at the surface. It was so destructive that the name "Fran" for a tropical storm or hurricane was retired from use.


The United States Geological Survey has information about subsidence in response to water and oil production.
Photo of a flooded residential area in Greenville, North Carolina by Jerry Ryan, United States Geological Survey. Excessive rain, a ruptured dam or levee, rapid ice melting in the mountains, or even an unfortunately placed beaver dam can overwhelm a river and send it spreading over the adjacent land, called a floodplain. Coastal flooding occurs when a large storm or tsunami causes the sea to surge inland.Most floods take hours or even days to develop, giving residents ample time to prepare or evacuate. These flash floods can be extremely dangerous, instantly turning a babbling brook into a thundering wall of water and sweeping everything in its path downstream.Disaster experts classify floods according to their likelihood of occurring in a given time period. A hundred-year flood, for example, is an extremely large, destructive event that would theoretically be expected to happen only once every century. In reality, this classification means there is a one-percent chance that such a flood could happen in any given year.
Over recent decades, possibly due to global climate change, hundred-year floods have been occurring worldwide with frightening regularity.Moving water has awesome destructive power.
When a river overflows its banks or the sea drives inland, structures poorly equipped to withstand the water's strength are no match.
The erosive force of moving water can drag dirt from under a building's foundation, causing it to crack and tumble.In the United States, where flood mitigation and prediction is advanced, floods do about $6 billion worth of damage and kill about 140 people every year.
A 2007 report by the Organization for Economic Cooperation and Development found that coastal flooding alone does some $3 trillion in damage worldwide. In China's Yellow River valley, where some of the world's worst floods have occurred, millions of people have perished in floods during the last century.When floodwaters recede, affected areas are often blanketed in silt and mud.
The water and landscape can be contaminated with hazardous materials, such as sharp debris, pesticides, fuel, and untreated sewage.
Residents of flooded areas can be left without power and clean drinking water, leading to outbreaks of deadly waterborne diseases like typhoid, hepatitis A, and cholera.But flooding, particularly in river floodplains, is as natural as rain and has been occurring for millions of years.
Famously fertile floodplains like the Mississippi Valley in the American Midwest, the Nile River valley in Egypt, and the Tigris-Euphrates in the Middle East have supported agriculture for millennia because annual flooding has left millions of tons of nutrient-rich silt deposits behind.Most flood destruction is attributable to humans' desire to live near picturesque coastlines and in river valleys. Aggravating the problem is a tendency for developers to backfill and build on wetlands that would otherwise act as natural flood buffers.Many governments mandate that residents of flood-prone areas purchase flood insurance and build flood-resistant structures. Massive efforts to mitigate and redirect inevitable floods have resulted in some of the most ambitious engineering efforts ever seen, including New Orleans's extensive levee system and massive dikes and dams in the Netherlands. And highly advanced computer modeling now lets disaster authorities predict with amazing accuracy where floods will occur and how severe they're likely to be.



Emergency preparedness activities for preschoolers
List out some perishable food items
A natural disaster is classified as a(an)


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