POTENTIAL FOR LIFE THREATENING FLASH FLOODING. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of south central and southeast Texas, including the following areas, in south central Texas, Coastal Jackson and Inland Jackson. In southeast Texas, Austin, Bolivar Peninsula, Brazoria Islands, Chambers, Coastal Brazoria, Coastal Galveston, Coastal Harris, Coastal Matagorda, Colorado, Fort Bend, Galveston Island, Grimes, Inland Brazoria, Inland Galveston, Inland Harris, Inland Matagorda, Matagorda Islands, Montgomery, Northern Liberty, Polk, San Jacinto, Southern Liberty, Trinity, Walker, Waller, Washington and Wharton. * WHEN...Through Thursday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - There is an increased risk to lives and property due to flash flooding. Flash Flooding is likely and considerable flash flooding is possible. Coastal areas will have the greatest potential for flooding overnight into Wednesday as Potential Tropical Cyclone One skirts along the Upper Texas Coast. Rainfall rates could exceed 4 inches per hour in the heaviest downpours. Additional widespread rainfall amounts of 2 to 4 inches with isolated higher totals possible especially along the coast. Grounds are fairly saturated across portions of Southeast Texas which would allow for a quicker transition of the rainfall to runoff. This increases the potential for street flooding, especially in the areas that have received 4+ inches of rain over the past few days. - Http://www.weather.gov/safety/flood