Floods are one of the most common hazards in the United States. Not all floods are alike, however. The size can vary greatly, affecting only a small neighborhood or multiple states. Some floods rise slowly over several days due to heavy rain, rapid snow melt, etc.
Historical outbreaks of infectious disease throughout the world attest to our continuing vulnerability. Social changes may contribute to an increase in the risk of new or re-emerging diseases. Mass population movements, rural-to-urban migration and accelerated urbanization, population growth, rapid transport, global trade, new food technologies, and new life styles have resulted in contact between more people at faster rates than at any other time in history.
Many residents in Irvine live in what is known as the Wildland/Urban Interface (WUI). The WUI is the area where structures and other human developments meet or intermingle with undeveloped wildland or areas with heavy vegetation.
Each year, many homes across the United States have been lost to WUI fires. Most fires are caused by lightning, but some are also caused by human activity in the WUI.
What is an earthquake?
An earthquake is caused by a sudden slipping or movement of a portion of the earth’s outer layer, called the crust. This sudden movement occurs along faults, or breaks in the earth’s crust along which blocks of earth move when built-up strain is released. The release of tension can cause the ground to shake violently, resulting in damage to buildings, roads, and utility systems over a wide area. Earthquakes can occur at anytime of the day or year with no warning.