One of the biggest factors for the current state of these now dried crater lakes is the over extraction of groundwater for both water supply and irrigation. The government has banned groundwater extraction and they are making various efforts to conserve the condition of these seven craters and prevent further damage. Since the Siete Luminarias are essential for agriculture and wildlife, there is a large amount of effort being pushed towards their preservation.
The current state of the dried crater lakes is largely due to excessive groundwater extraction for both drinking water and irrigation purposes. The government has imposed restrictions on groundwater extraction, and they are actively working to protect these seven craters from further deterioration. Given the importance of the Siete Luminarias for agriculture and wildlife, there's a strong push towards their preservation.