Arnold, CA…The National Weather Service in Sacramento CA has issued an Excessive Heat Warning as…Dangerously hot conditions to return to northern California. High pressure over the Desert Southwest will build west over California later this week, resulting in widespread warming over northern California. High temperatures will soar well into the triple digits by Thursday Valley-wide with some areas in the Sacramento and San Joaquin Valleys approaching 110 to 112 degrees for Thursday and Friday. Isolated areas could get as hot as 113 degrees. These hot afternoon temperatures, combined with warm overnight lows in the upper 60s to low 80s, will produce widespread high to very high heat risk. Consequently, an Excessive Heat Warning has been issued.