Extreme heat expected to hit Tulare County in coming days, thunderstorms possible
Heat index, explained: This is how heat waves are measured Heat waves are becoming more frequent globally. But how do we measure heat waves? We exp...

Heat index, explained: This is how heat waves are measured Heat waves are becoming more frequent globally. But how do we measure heat waves? We explain. High temperatures — 12 to 14 degrees above normal for this time of year — are expected throughout Central California this week. The extreme heat is expected to hit between Wednesday afternoon and Thursday afternoon, according to the National Weather Service Hanford forecast discussion . The San Joaquin Valley is expected to see highs in the mid to high 90s.