Scientists say the effects of Hurricane Harvey, which has been stalled over the Texas Gulf Coast since Friday and dumped more than 20 inches of rain in some areas, were worsened by a lethal confluence of meteorological events: warm water in the Gulf of Mexico that intensified the rainfall, and a lack of winds in the upper atmosphere that could have steered Harvey away from land.
Exacerbating the situation, said Hal Needham, a storm surge expert and founder of the private firm Marine Weather & Climate in Galveston, Tex., was that the storm surge elevated Galveston Bay, blocking drainage of the rain that pummeled coastal and inland areas.
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