Seattle Heat Wave 2025. Amid the ongoing heat wave, water use has spiked significantly on the island, causing its reservoirs to be depleted faster than they can be refilled. In the late summer months of 2021, seattle was impacted by a major heat dome that covered a majority of the pacific northwest region.

Amid the ongoing heat wave, water use has spiked significantly on the island, causing its reservoirs to be depleted faster than they can be refilled. On sunday, we broke that record, and on monday, we broke it again with a high of 108 degrees.