La Niña is about to take the Southwest drought from bad to worse

Daily Bulletin

Global scientists reported in August that due to the climate crisis, droughts that may have occurred only once every decade or so now happen 70% more frequently. The increase is particularly apparent in the Western US, which is currently in the the throes of a historic, multiyear drought that has exacerbated wildfire behavior, drained reservoirs and triggered water shortages.

More than 94% of the West is in drought this week — a proportion that has hovered at or above 90% since June — with six states entirely in drought conditions, according to the US Drought Monitor. On the Colorado River, Lake Mead and Lake Powell — two of the country’s largest reservoirs — are draining at alarming rates, threatening the West’s water supply and hydropower generation in coming years.

Though summer rainfall brought some relief to the Southwest, the unrelenting drought there is about to get worse with La Niña on the horizon, according to David DeWitt, director at the National Oceanic and Atmospheric Administration’s Climate Prediction Center.

“As we move into fall, from October on, the Southwest US, based on all the best information that we have, they’re going to see persistent intensification and development of drought,” DeWitt told CNN. “There’s, at this point, not any indication that they’ll see drought relief.”

Global scientists reported in August that due to the climate crisis, droughts that may have occurred only once every decade or so now happen 70% more frequently. The increase is particularly apparent in the Western US, which is currently in the the throes of a historic, multiyear drought that has exacerbated wildfire behavior, drained reservoirs and triggered water shortages.

More than 94% of the West is in drought this week — a proportion that has hovered at or above 90% since June — with six states entirely in drought conditions, according to the US Drought Monitor. On the Colorado River, Lake Mead and Lake Powell — two of the country’s largest reservoirs — are draining at alarming rates, threatening the West’s water supply and hydropower generation in coming years.

Though summer rainfall brought some relief to the Southwest, the unrelenting drought there is about to get worse with La Niña on the horizon, according to David DeWitt, director at the National Oceanic and Atmospheric Administration’s Climate Prediction Center.

“As we move into fall, from October on, the Southwest US, based on all the best information that we have, they’re going to see persistent intensification and development of drought,” DeWitt told CNN. “There’s, at this point, not any indication that they’ll see drought relief.”

According to Mankin, the longer-term fate of the Western drought remains bleak. What’s needed now, he said, is several years of rain and mountain snow to replenish the draining reservoirs and rivers.

That becomes more unlikely as the climate crisis worsens. Experts say the West will only continue to see more droughts like the present one in the years to come — and only rapid, immediate cuts to fossil fuels can halt this harsh trend.

“Global warming is making the atmosphere over the West warmer and thirstier, such that even the rain and snow that was once normal may be too little to quench it,” Mankin said. “The only way to stop the kind of atmospheric demand increases that have made this drought so impactful, is to stop combusting fossil fuels.”

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Daily Bulletin