Thermometers in Anchorage hit 90 degrees Fahrenheit (about 32 degrees Celsius) for the first time on record this Thursday.

The National Weather Service said temperatures around the city were unusually high on the Fourth of July thanks to a massive heat dome that’s settled over Alaska, which has seen more than 30 days in a row of above average temperatures. Readings on Thursday shattered a 50-year-old temperature record set June 14, 1969, when the mercury hit 85 degrees.

The heat wave is expected to continue through July 8, and weather officials said thermometers could top out around 90 degrees again and again.