Floods | Ready.gov
Failing to evacuate flooded areas, entering flood waters, or remaining after a flood has passed can result in injury or death. Flooding is a temporary overflow of water onto land that is normally dry. Floods are the most common natural disaster in the United States. Floods may: Result from rain, snow, coastal storms, storm surges, and overflows of dams and other water systems. Do not walk, swim, or drive through flood waters. Prepare NOW Know types of flood risk in your area. Survive DURING Depending on where you are, and the impact and the warning time of flooding, go to the safe location that you previously identified. Be Safe AFTER Listen to authorities for information and instructions. Associated Content
What is a volcano?
Introduction to volcanoes The earth's mountains, plains, plateaus, soils, rocks, etc. as we see it today is believed to have gone through many phases, with about 80% of it being carved out by the action of volcanoes. A volcano is simply a rapture (opening or vent) on the earth's surface (crust) through which molten magma (extremely hot mixture of gases, lava, ash and other burning substances) escape on to the earth's surface. How do Volcanoes look like? In May 1980, the Mountain St. Volcanoes occur at weak zones or points in the earth’s crust (including constructive and destructive boundaries). For history lovers… In A.D. 79 (really long ago) two Roman cities, Pompeii and Herculaneum, were completely buried in ash and dust in a matter of hours after a volcanic eruption. The word, ‘volcano’ was made out of the name of a Roman god of a small island in the Mediterranean sea of Sicily called ‘Volcan’. Now we shall see in a bit more detail how volcanoes come about.
Severe Weather 101: Flood Basics
Densely populated areas are at a high risk for flash floods. The construction of buildings, highways, driveways, and parking lots increases runoff by reducing the amount of rain absorbed by the ground. This runoff increases the flash flood potential. Sometimes, streams through cities and towns are routed underground into storm drains. Areas near rivers are at risk from flash floods. Dam failures can send a sudden destructive wall of water downstream. Mountains and steep hills produce rapid runoff , which causes streams to rise quickly. Very intense rainfall can produce flooding even on dry soil. Additional high-risk locations include low water crossings, recent burn areas in mountains, and urban areas from pavement and roofs which concentrate rainfall runoff. Ice jams and snowmelt can help cause flash floods.
Natural Disasters
1. Most natural disasters are caused by weather. Weather disasters can be caused by hurricanes, tornadoes, floods, tsunamis, thunderstorms, wind storms, wildfires, avalanches, and blizzards. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Flood Facts, Types of Flooding, Floods in History
In terms of lives lost and property damaged, floods are just behind tornadoes as the top natural disaster. In the United States, flood damages totaled $8.41 billion in 2011. There were 113 flood-related deaths. Floods can affect any area to some degree; wherever rain falls, flooding can occur. As water falls to the Earth in the form of rain or snow, it seeps into the ground. Water running downhill into channels and streams begins to "pile up", eventually overrunning the sides of those channels. Types of flooding There are several types of flooding. Overbank flooding: What most people think of when they hear the word "flood." Flash floods: Water from floods can take time to build up, allowing the population in an area time to be warned in advance. Ice jam flooding: In cold temperatures, bodies of water are often frozen. Coastal flooding occurs along the edges of oceans, and is driven predominantly by storm surges and wave damage. In case of emergency Dangerous floods in history Related:
Weather Wiz
Thunderstorms What is a thunderstorm? A thunderstorm is a storm with lightning and thunder. Its produced by a cumulonimbus cloud, usually producing gusty winds, heavy rain and sometimes hail. What causes a thunderstorm?The basic ingredients used to make a thunderstorm are moisture, unstable air and lift. When are thunderstorms most likely to occur? How many thunderstorms are there every day? What is lightning? What causes lightning? Have you ever rubbed your feet across carpet and then touched a metal door handle? Click Here to see where lightning is currently striking across the U.S.What causes thunder? How far away can you see lightning and hear thunder? What is hail? What causes the wind to blow? What is a gust front? Know the Lingo SEVERE THUNDERSTORM WATCH - A severe thunderstorm (damaging winds of 58 miles per hour or more, or 1" hail in diameter or greater) is likely to develop in your area. Know the Facts The typical thunderstorm is 15 miles in diameter and lasts an average of 30 minutes.
Bathyal zone - Wikipedia
The layers of the pelagic zone. The bathyal zone or bathypelagic – from Greek βαθύς (bathýs), deep – (also known as midnight zone) is the part of the pelagic zone that extends from a depth of 1000 to 4000 meters (3300 to 13000 feet) below the ocean surface. It lies between the mesopelagic above, and the abyssopelagic below. The average temperature hovers at about 4 °C (39 °F). Although larger by volume than the euphotic zone, the bathyal zone is less densely populated. Sunlight does not reach this zone, meaning primary production, if any, is almost nonexistent. Except where the ocean is exceptionally deep, the bathyal zone extends to the benthic zone on the ocean bed of that part of the continental slope that lies between 1000 and 4000 meters deep. See also[edit] Bathypelagic fish References[edit] Enig, C.
