Excessive Heat — Carquinez Strait and Delta, California

2021-07-09 to 2021-07-10 · Carquinez Strait and Delta, California

Event narrative

The Delta regions saw high temperatures reach upwards of 105 to 107 degrees on the 9th and 10th.

Wider weather episode

High pressure originating from the four-corners region built westward into California resulting in very hot daytime temperatures and warm overnight low temperatures across interior Northern California. High to very high heat risk impacted the region with a several day heatwave. One daily high temperature record was tied and one daily high temperature record was broken. During the event, cooling centers were made available to the public across interior Northern California.

Source: NOAA Storm Events Database, event_id 977388. Narrative written by the NWS forecast office that issued the report.