![]() ![]() “Our crews are dedicated to making sure emergency managers have the information they need to help keep Texans safe – during the storm and into the future.” “The USGS had more than 100 employees from 16 states in the field working around the clock for about five weeks collecting flood measurements after the storm,” said Tim Raines, USGS Texas Water Science Center Director. This probability is also referred to as a 500-year flood. Thirty other USGS streamgages experienced flooding at levels with a 1 percent chance of occurring each year, also known as a 100-year flood. At two streamgage locations, scientists determined that the percent chance for flooding of this magnitude to happen in any given year was 0.2 percent. Record streamflow was measured at 40 USGS streamgages in Texas that have been in operation at least 15 years. The data and records will assist officials in updating building codes, planning evacuation routes, creating floodplain management ordinances, providing environmental assessments and planning other community efforts to become more flood-resilient. High-water mark data, along with flood flow information from USGS streamgages, were used to create 19 inundation maps to document the areal extent and depth of the flooding.įEMA requested time-perishable high-water marks, updated water-level records and Harvey inundation maps, which are key materials that will be used by state and local resource managers. Although parts of central Louisiana experienced Harvey related flooding, this report only documents the extent of flooding in southwest Louisiana along the Sabine River. USGS field crews collected 2,123 high-water marks in 22 counties in southeast Texas and three parishes across southwest Louisiana. In the immediate aftermath of Harvey, the USGS and FEMA initiated a study to evaluate the magnitude of flooding, determine the probability of future occurrence and map the extent of the flooding in Texas. Not only were rainfall totals exceptional during Hurricane Harvey, the area affected was also larger than previous events. history was during Tropical Storm Amelia in 1978, which left Texas Hill Country with 48 inches of rain. The second largest rainfall event recorded in continental U.S. The New Jersey Department of Environmental Protection has issued a code orange air quality alert Wednesday for Southwestern New Jersey.Hurricane Harvey’s widespread 8-day rainfall, which started on August 25, 2017, exceeded 60 inches in some locations, which is about 15 inches more than average annual amounts of rainfall for eastern Texas and the Texas coast. AIR QUALITY ALERT IS IN EFFECT FOR WEDNESDAY JULY 12. Sensitive groups include children.people More ![]() A code orange air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. ![]() The New Jersey Department of Environmental Protection has issued a code orange air quality alert Wednesday for Monmouth County. A code orange air quality alert means that air pollution concentrations within the region may become unhealthy for More The New Jersey Department of Environmental Protection has issued a code orange air quality alert Wednesday for Middlesex and Mercer Counties. The Delaware Valley Regional Planning Commission has issued a code orange air quality alert Wednesday for The Philadelphia Metro area. ![]() ![]()
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