‘The threat is here’: searing US heatwave bad news for wildfire season and water supply
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<p>Experts say brutal temperatures in west threaten to melt sparse snowpack – and warn hot, dry conditions here to stay</p><p>A stunning heatwave that shattered records in the US west is threatening to rapidly melt the sparse snowpack and ramp up wildfire risks in the seasons ahead.</p><p>March has already been historically hot<em>,</em> but the early onset of summer weather across the region may be here to stay. There’s little reprieve in forecasts, whi
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‘The threat is here’: searing US heatwave bad news for wildfire season and water supply Experts say brutal temperatures in west threaten to melt sparse snowpack – and warn hot, dry conditions here to stay A stunning heatwave that shattered records in the US west is threatening to rapidly melt the sparse snowpack and ramp up wildfire risks in the seasons ahead. March has already been historically hot , but the early onset of summer weather across the region may be here to stay. There’s little reprieve in forecasts, which show more heat records may fall this spring. Extreme heat is exceptionally dangerous, especially so early in the year, when bodies and systems are not prepared for it and when it lingers over a long period of time. This heatwave is also posing significant threats to the water supply. After one of the warmest winters in the west, the snow that feeds streams , reservoirs and soil moisture as it melts through the summer season is already dismally scarce in key watersheds. “Anomalous warmth and historic snow drought will still lead to ecological and wildfire-related impacts as soon as this spring, and possibly wider water challenges by late summer and beyond,” climate scientist Daniel Swain said in a post about the heat. His primary concern is in the interior west, especially the Colorado River basin, which could face “water supply and hydroelectric shortfalls, an early and intense fire season, and ecosystem degradation”. “This is a big deal,” he added. The unprecedented heat event pushed temperatures between 20 to 30F higher than average across the region, with some areas seeing spikes up to 40F higher than normal. March high temperature records have already been broken in at least 14 states. A new national temperature record for the month was smashed last Thursday, when an area in Arizona hit 110F (43.3C). The record didn’t stand long; by Friday, it was broken again, when a parts of California and Arizona reached 112F (44.4C). The record is just one de...
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