Almost 200,000 people have been evacuated from several areas in northern California by severe damage detected in a spillway at Oroville dam, although the threat of flooding is lower in the last hours, local media reported today.
Authorities ordered the evacuation of nearly 200,000 people in northern California early Monday after detecting severe damage to a spillway at the Oroville dam, which could potentially result in flash floods.
An evacuation plan affecting 188,000 people in the area was issued after the National Weather Service announced a flash flood warning on Sunday night due to the potential collapse of a portion of Oroville dam auxiliary spillway, located some 250 kilometers northeast of San Francisco, though in the past hours, local authorities downgraded the risk of a complete spillway collapse.
According to the official warning, the collapse of the spillway channel, a crucial safety component of the 230 meter (755 foot) dam wall, due to the heavy rainfall “would result in an uncontrolled release of flood waters from Lake Oroville.”
According to local officials cited in the Los Angeles Times, the warning was downgraded as the water level decreased and was no longer overloading the damaged spillway.
In the past hours, local emergency services attempted to fill in the spillway’s gaping hole with bags of rocks and tried to lower the water level of Lake Oroville to reduce pressure on the spillway.
Butte County Sheriff, Kory L. Honea, said the California Department of Water Resources told him the water erosion risk had subsided and “was not eroding the spillway as fast as feared,” therefore averting the disaster.
Over the weekend there was “considerable concern” the hole would compromise the integrity of the spillway, and result in a “substantial” release of water.
“We had to make a very critical and difficult decision to initiate the evacuation of the Oroville area,” Sheriff Honea added.
Los Ángeles (EE.UU.), 13 de febrero de 2017, EFE/Practica Español
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Comprensión del texto B.1 (Comprehension B.1)
Miles de personas tuvieron que abandonar sus hogares.
Las autoridades han construido una nueva presa en California.
Hubo una gran inundación en California.
Porque el agua está inundando varias regiones de California.
Porque se ha derrumbado una presa cercana.
Porque la presa podría derrumbarse.
La presa tiene daños superficiales.
La presa está en perfectas condiciones.
La presa tiene daños importantes.
Es la primera vez que una presa se desborda en Estados Unidos.
La amenaza de inundación persiste en toda California.
Parece que ha disminuido el riesgo de una inundación.
En el centro de Estados Unidos.
En la zona este de Estados Unidos.
En la zona suroeste de Estados Unidos.