Shon Teeple of Milwaukie pumps his own gas at a Fred Meyer gas station in Milwaukie, Oregon, on July 30, 2022. The station was one of many that temporarily implemented self-serve gas pumping during the heat wave emergency.

Oregonians in 25 counties can pump their own gasoline through Sunday, when Gov. Kate Brown’s emergency declaration for extreme heat ends.

The declaration allowed the State Fire Marshall to temporarily change state rules on self-service pumping to protect station workers from spending too much time in the heat.

On Tuesday, Brown declared a state of emergency to last July 25-31 because of excessive high temperatures. It spans across most of the state, except for the coast and southeast Oregon.

Much of the state is enduring a massive weeklong heatwave, with some areas in the generally cooler north reaching 100 degrees and warmer areas in Southern Oregon reaching 110 degrees.

Multnomah County health officials say they’re investigating at least five deaths that may be related to the heat wave, and Clackamas County officials are investigating one potential heat-related death.

Temperatures are expected to start cooling by Monday. In the Portland area, the National Weather Service projects a high of 89 degrees and a nighttime low of 63 degrees that day, then says temperatures will dip a few more degrees on Tuesday.

New state rules require access to water, shade and breaks on hot days, but some workers say they’re still laboring in unsafe conditions as temperatures hit triple digits this week.

The Oregon State Medical Examiner’s Office said that confirming the official cause of death could still take months.

Extreme heat is forecast to stretch through the weekend in the Pacific Northwest and authorities are investigating whether triple-digit temperatures were to blame for the deaths of at least four people.

The occupants of Portland’s Charles Jordan Community Center on a blistering hot Tuesday afternoon offered a reminder of who will be hardest hit by the climate disasters that have become almost routine in the Pacific Northwest: the poorest residents.

Weekend Edition Sunday with Ayesha Rascoe