The National Weather Service in Brownsville has issued a flash flood emergency for northwest Cameron County and eastern Hidalgo County and it remains in effect until 10:30 a.m.
Forecasters say there is a line of thunderstorms producing heavy rain across that area causing flash flooding.
There are numerous reports of submerged cars on the frontage roads of Interstate 2/Expressway 83.
A number of cities are being impacted by the flood warning including Harlingen, Weslaco, San Benito, Mercedes, La Feria, Progreso, Edcouch, Santa Rosa, Rio Hondo and La Villa.
