Large parts of the Pacific Northwest from Oregon and Washington to British Columbia are bracing for unusually high temperatures this weekend, some areas could see daily averages up to 30 degrees above normal.
Sources: Global Historical Climatology Network; National Weather Service; Environment and Climate Change Canadaat least two hours of exposure to heat for a period of four to 14 days.
Outdoor workers are especially at risk during an early heat wave when temperatures first begin to increase in the spring or early summer. The Labor Department’s Occupational Safety and Health Administration recommends shorter shifts and more frequent breaks. This allows workers to gradually gain tolerance to the increased heat.
“Being early in the warm season and relatively mild, these events may fly under the radar of the public,” said Kevin Lanza, an assistant professor at UTHealth Houston School of Public Health. He warned that areas characterized by “urban heat islands” — neighborhoods with few trees and an abundance of heat-trapping pavement — would see higher temperatures.McMahon said the population groups most vulnerable to extreme heat include the elderly, small children, outdoor workers and pregnant women.
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