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The threat of flooding and overflowing dams continue in Mexico, after hurricane Alex lashed northeastern parts of the country last week. The hurricane has killed dozens and caused substantial damage.
18 thousand people are being evacuated from their homes in Mexico after days of heavy rain, caused extensive flooding.
Mexico's National Water Commission said the dam currently had the largest emergency water release in the country.
20 floodgates had been opened by late Tuesday at one Dam, which was releasing 600 cubic meters per second into the Salado River, a tributary of the Rio Grande.
A local official says the situation is "critical", calling flood controls necessary.
Authorities remained on high alert for the possible overflow of River Bravo, which divides Mexico with the United States.
David Negrete, The Int's Boundary and Water Commission, said, "We are expecting a higher expense than expected. We said we would receive 4,000 cubic meters, we have now received 5,000 cubic meters more in Piedras Negras. That means the water from the river will run into the structure of the bridge. That's the most critical thing."
The US National Weather Service said a new storm was likely to make its way across the Gulf of Mexico and hit the region within a day or two.