• Rising sea level-induced floods cause increase in flood insurance rates

    Long-term sea level rise has made tidal flooding a near-daily event in many cities, compared to 1950 when it occurred about once every two years. As sea level rises, threatening more homes along flood zones, flood insurance claims are expected to increase. The Home­owner Flood Insurance Affordability Act of 2014 (HFIAA), which went into effect on 1 April, means that primary homeowners would see an average 10 percent increase in flood insurance premium yearly, along with an extra $25 annual surcharge. Secondary owners of vacation houses and condominiums can expect about an 18 percent rate increase, plus a $250 annual surcharge.

  • California imposes first mandatory water restrictions in state history

    Standing on a patch of brown grass in the Sierra Nevada mountains, which is usually covered with several feet of snow at this time of the year, California governor Jerry Brown announced the first mandatory water restrictions in state history. “Today we are standing on dry grass where there should be five feet of snow,” Brown said yesterday. “It’s a different world… we have to act differently.”About 30 percent of California’s water supply comes from the Sierra Nevada snowpack, so less snow means less snowmelt, which means less water.

  • NASA asteroid hunter spacecraft data available to public

    Millions of images of celestial objects, including asteroids, observed by NASA’s Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) spacecraft now are available online to the public. The data was collected following the restart of the asteroid-seeking spacecraft in December 2013 after a lengthy hibernation. NEOWISE is a space telescope that scans the skies for asteroids and comets. The telescope sees infrared light, which allows it to pick up the heat signature of asteroids and obtain better estimates of their true sizes. As a result, NEOWISE can see dark asteroids that are harder for visible-light surveys to find.

  • Options for providing affordable flood insurance premiums

    The National Flood Insurance Program (NFIP) within the Federal Emergency Management Agency (FEMA) faces dual challenges of maintaining affordable flood insurance premiums for property owners and ensuring that revenues from premiums and fees cover claims and program expenses over time. A new report found that these objectives are not always compatible and may, at times, conflict with one another. The report discusses measures that could make insurance more affordable for all policy holders and provides a framework for policymakers to use in designing targeted assistance programs.

    • view counter

  • States seek to protect grid from solar flare damage

    Citing warnings from scientists about the threat of major solar storms — or EMPs, intense bursts of radiation from the sun — and their potential to disrupt the nation’s electrical grid, many state lawmakers are introducing legislation that seeks to protect their region’s infrastructure. Congress has commissioned reports and held hearings about the dangers of solar storm events, but little action has been taken, prompting many state legislators to take matters in their own hands.

  • Countries brace for forced migration due to climate change

    Scientists say that one of the more disturbing aspects of climate change-related disruptions is looming climate-induced migration crisis. Extreme weather disasters, sea level rise, and environmental degradation are factors which could trigger a mass migration, disrupting populations and destabilizing governments. A recent study sponsored by the governments of Switzerland and Norway found that an estimated 144 million people were at least temporarily displaced between 2008 and 2012.

    • view counter

  • U.K. coastal railways at increasing risk from climate change

    Footage of a railway line suspended in mid-air and buffeted remorselessly by the storm that had caused the sea wall to collapse beneath it made for one of the defining images of 2014. Scenes such as those witnessed at Dawlish in Devon are set to become more frequent as a result of climate change, and the U.K. government and rail companies must face up to difficult funding decisions if rural areas currently served by coastal lines are to continue to be connected to the rail network. For railway builders in the mid-nineteenth century the coast was cheaper, flatter, and easier than using inland sites, one expert points out. “We wouldn’t have built these railway lines where they are if we had today’s knowledge.”

  • Earthquake-proofing L.A.’s water infrastructure

    Since Los Angeles mayor Eric Garcetti announced his earthquake-safety proposal in December 2014, public attention has focused on requirements to retrofit old vulnerable buildings, but the plan also calls for fortifying the city’s vast network of water pipes and aqueducts. Water infrastructure is “the single biggest vulnerability we’re facing in Southern California,” said U.S. Geological Survey seismologist Lucy Jones, who helped develop Garcetti’s earthquake-safety plans.

  • World population may outpace water supply by mid-century

    Population growth could cause global demand for water to outpace supply by mid-century if current levels of consumption continue. It would not, however, be the first time this has happened, a new study finds. Using a delayed-feedback mathematical model which analyzes historic data to help project future trends, the researchers identified a regularly recurring pattern of global water use in recent centuries. Periods of increased demand for water — often coinciding with population growth or other major demographic and social changes — were followed by periods of rapid innovation of new water technologies that helped end or ease any shortages. The researchers’ conclusions: Technological advances will be needed in coming decades to avoid water shortages.

  • Rising sea level will double Hawaii’s coastal erosion by mid-century

    New research brings into clearer focus just how dramatically Hawaiʻi beaches might change as sea level rises in the future. Chronic erosion dominates the sandy beaches of Hawaiʻi, causing beach loss as it damages homes, infrastructure, and critical habitat. Researchers have long understood that global sea level rise will affect the rate of coastal erosion. The research team developed a simple model to assess future erosion hazards under higher sea levels, taking into account historical changes of Hawaiʻi shorelines and the projected acceleration of sea level rise reported from the IPCC. The results indicate that coastal erosion of Hawaiʻi’s beaches may double by mid-century.

  • Policy makers discount damages from future climate tipping points – but they should not

    Most methods that weigh up the costs and benefits of tackling climate change ignore climate tipping points, and especially the uncertainty surrounding them. Instead, they assume that future damages from climate change are known perfectly and can therefore be discounted at a rate comparable to the market interest rate – thus reducing the willingness to pay now to protect future generations. New research shows, however, that the prospect of an uncertain future tipping point should greatly increase the amount we are willing to pay now to limit climate change. The study argues that society should set a high carbon tax now to try and prevent climate change reaching a point of no return.

  • Japan debating 400 km sea wall to protect coast from tsunami, floods

    Four years after the Tōhoku earthquake and tsunami destroyed much of Japan’s northeastern coast, officials are reviewing plans for a $6.8 billion, 400 kilometer chain of concrete seawalls for protecting coastal towns from future flooding and tsunamis. Opponents say the project will harm fisheries and damage marine ecology and scenery, while offering little, if any, actual protection and creating unjustified complacency among coastal residents. Former prime minister Morihiro Hosokawa is leading a Green Wall coalition which calls for an alternative: planting mixed forests along the coasts on tall mounds of soil or rubble, creating a living green wall which would last long after the concrete walls have crumbled. The green wall project would not completely prevent flooding but it would slow tsunamis and weaken the force of their waves.

  • Blowing up Mississippi River levee reduced 2011 flood risk

    A controversial decision in 2011 to blow up Mississippi River levees reduced the risk of flooding in a city upstream, lowering the height of the rain-swollen river just before it reached its peak, according to a new analysis. “Our model’s not saying the water would have definitely overtopped the levees at Cairo,” says one of the study’s authors. “It doesn’t say it wouldn’t have happened. What we’re saying is that detonation reduced the risk of flooding.” The new research found that allowing those levees to overtop naturally would have resulted in less erosion – so they urge greater control of erosion in future scenarios involving blowing up levees.

  • Economists count true business costs of climate change

    A new report, prepared for leading social housing provider Aster Group, urges businesses to consider the true financial costs of climate change in order to better plan for extreme weather events. From countering the effects of extreme winter weather to summer heat waves, the report highlights three main risk factors: flooding, subsidence, and the risk of over-heating for elderly residents. The report pinpoints detailed cost implications for the organization were no actions to be taken.

  • Colorado deploys latest flood forecasting technology

    Colorado governor John Hickenlooper has raised concerns about House Bill 1129, a 5-year, $10 million proposal to implement a new technology which would assist with predicting the direction and intensity of wildfires and floods. Scientists have spent twenty years working on the proposed technology for Colorado, saying it is finally ready for implementation. The technology uses rainfall estimation, precipitation forecasting, and water modeling along with hundreds of thousands of atmospheric data points to predict the direction, speed, and intensity of floods, with up to 12-hour notice. As advancements in technology and computing allow for more accurate flood predictions, some variables remain a challenge for hydrologists.