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  2. 100-year flood - Wikipedia

    en.wikipedia.org/wiki/100-year_flood

    A 100-year flood is a flood event that has on average a 1 in 100 chance (1% probability) of being equaled or exceeded in any given year. [1] A 100-year flood is also referred to as a 1% flood. [2] For coastal or lake flooding, a 100-year flood is generally expressed as a flood elevation or depth, and may include wave effects. For river systems ...

  3. Flood insurance rate map - Wikipedia

    en.wikipedia.org/wiki/Flood_Insurance_Rate_Map

    FIRMs display areas that fall within the 100-year flood boundary. Areas that fall within the boundary are called special flood hazard areas (SFHAs) and they are further divided into insurance risk zones. The term 100-year flood indicates that the area has a one-percent chance of flooding in any given year, not that a flood will occur every 100 ...

  4. List of counties in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_counties_in_Illinois

    Illinois also has two counties named after the same person, New York governor DeWitt Clinton (DeWitt County, and Clinton County). Information on the FIPS county code , county seat , year of establishment, origin, etymology , population, area and map of each county is included in the table below.

  5. What's a 100-year flood? A hydrologist explains

    www.aol.com/news/whats-100-flood-hydrologist...

    A '100-year flood' doesn't mean you'll be flood-free for the next 99 years. Win McNamee/Getty ImagesA 100-year flood, like a 100-year storm, is one so severe it has only a 1% chance of hitting in ...

  6. New flood maps show US damage rising 26% in next 30 years due ...

    www.aol.com/news/flood-maps-show-us-damage...

    Over the next three decades, the cost of flood damage is on pace to rise 26% due to climate change alone, an analysis of our new flood risk maps shows. That’s only part of the risk.

  7. How much damage did flooding cause in southwest IL ... - AOL

    www.aol.com/news/much-damage-did-flooding-cause...

    The streets that were closed at one point include: First, Second, Third, Cleveland, Centreville Avenue, Monroe, Washington, West Main at North Sixth, F Street, Douglas Avenue at Illinois Street ...

  8. Cairo, Illinois - Wikipedia

    en.wikipedia.org/wiki/Cairo,_Illinois

    Cairo (/ ˈ k ɛər oʊ / KAIR-oh, [4] sometimes / ˈ k eɪ r oʊ / KAY-roh) [5] is the southernmost city in Illinois and the county seat of Alexander County. A river city, Cairo has the lowest elevation of any location in Illinois and is the only Illinois city to be surrounded by levees.

  9. Disaster proclaimed in St. Clair County. Flooding in ... - AOL

    www.aol.com/news/water-rescues-power-outages...

    Mascoutah and Belleville fire departments are on the scene of an area near Illinois Route 158 and Keck Road for a water rescue, according to the St. Clair County Emergency Management Agency. 11:46 ...