weather drought monitor western states 05152021
Fire season concerns grow as drought envelops California
02:04 - Source: CNN

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CNN  — 

As extreme drought continues to choke the southwest, new satellite images are showing the significant effect it’s having on California’s reservoirs – many have critically low water levels.

According to the US Drought Monitor, all of California is in some form of drought, with over 85 percent in extreme drought. That has many in California concerned about fire season, which will likely be exacerbated by the drought.

Some of California’s major reservoirs, which span the center of the state, are in areas with the highest levels of drought. Eleven of the state’s twelve major reservoirs are below their historical average, according to California’s Department of Water Resources.

Although California’s drinking water largely relies on groundwater and the Colorado River, its reservoir system is vital to the massive agriculture industry in the state. The state produces over a third of the country’s vegetables and two-thirds of the country’s fruits and nuts, according to the California Department of Food and Agriculture.

Lake Oroville, the state’s second largest reservoir, is only 35 percent full. A new satellite image from the Copernicus satellite, obtained by Maxar Technologies, shows just how low the lake’s water levels are. Lake Oroville is located just over 60 miles north of Sacramento, the state capital.

Lake Oroville in California. Maxar

If you are unable to view the satellite images, click here.

A significant amount of lake bed has now become exposed due to the dramatic drop in water level. Boats still dot the lake in the Bidwell Canyon area, but many of the existing boat ramps are dry.

Water levels are so low at the lake that the Oroville Dam, located on the southwest corner of the lake, is expected to shut down.

Oroville Dam in California. Satellite image ©2021 Maxar Technologies

The Edward Hyatt Power Plant, opened in 1967, has never been shut down before. It generates power for around 800,000 homes; its shutdown is expected to cause even further strain on California’s already taxed power grid.

Water levels at Lake Oroville are near historical lows, set back in 1977.

Over at Lake Folsom, just east of Sacramento, water levels are the lowest among California’s 12 major reservoirs.

Since June of 2020, its water levels have dropped by more than half – only 33 percent full. Right now, it has just over 325,000 acre-feet of water; in June 2020, it had around 800,000 acre-feet.

An acre-foot is the amount of water needed to cover one acre, with one foot of water – about 325,851 gallons of water – according to the California Department of Water Resources.

Folsom Lake in California. Satellite image ©2021 Maxar Technologies

Maxar Technologies’ satellite image from June 13, 2020 shows the lake when it was largely full. But 370 days later, a second satellite image shows a much different lake – the lake bed on the western shore is largely exposed.

Islands that once dotted the center of the lake have since disappeared, with the significant drop in water levels transforming them into a peninsula.

California’s largest reservoir, Lake Shasta, is down well over a million acre-foots, compared to last year. Right now, it only has about 41 percent of its total capacity.

Shasta Lake in California. Satellite image ©2021 Maxar Technologies

The water level drop in the massive reservoir is significant. The green vegetation surrounding the lake helps show just how much of the lake bed has been exposed by drought.

Looking closely at the lake, floating marinas have also had to move with the water level.

The Trinity reservoir is the fourth largest in California, but like the others, has seen a significant drop in water levels. It’s at about roughly 49 percent of its total capacity.

Like the other lakes, satellite images show the water level drop has exposed much of the lake bed.

Trinity Lake in California. Satellite image ©2021 Maxar Technologies

But more noticeable are the northern section of the lake, which is fed by the Trinity River and a number of other creeks. That area has seen the most dramatic drop in shoreline.