red flag warning

The National Weather Service, or NWS, issued an excessive heat watch for the East Bay Hills Friday, as first reported by Berkeleyside.

The city of Berkeley sent out a bulletin Sunday warning the community of higher fire risk in the Berkeley Hills.

Alameda County sent out a red flag warning for East Bay hills and interior valleys in an AC Alert Sunday.

A high fire danger warning has been issued for Berkeley Hills residents starting from 11 p.m. Sunday and is scheduled to end at 11 a.m. Monday.

A high fire danger warning has been issued for Berkeley Hills residents from 5 a.m. Wednesday through 11 a.m. Friday.

The National Weather Service in San Francisco issued a Red Flag Warning for Alameda County, expected to last from 4 a.m. Wednesday until 7 p.m. Thursday. 

Red Flag Warnings are typified by extreme fire behavior, including “gusty and potentially strong, damaging north to northeast winds” and low humidity, according to the warning.

A Nixle alert stated that a red flag warning means critical fire weather conditions are occurring or will occur. The alert said a condition of low relative humidity, warm temperatures and strong winds can contribute to extreme fire behavior.

The National Weather Service issued a Red Flag Warning — “due to high winds and dry conditions” — for the East Bay Hills, to last from Monday through Tuesday night, according to a Nixle alert sent at about 3:30 p.m. Monday.

According to the alert, the affected areas are the East Bay Hills and fire weather zone 511, which includes all locations above 1,000 feet for the East Bay and the Diablo Range of Santa Clara County, including Mount Hamilton.