Get ready for a heat wave.
The National Weather Service issued an advisory this afternoon, warning that temperatures could reach 100 degrees in Modesto and elsewhere in the Central Valley by Thursday.
The weather service also issued a "fire weather watch" through Friday morning for the Sacramento Valley, the Northern San Joaquin Valley, the Sierra foothills, the Sacramento Delta and Lake County.
The weather service said an unusually strong ridge of high pressure was expected to build into Northern California by midweek, pushing temperatures as much as 20 degrees above normal in the northern interior of the state. Record and near-record temperatures are possible, with low humidity and gusty north to east winds.
Temperatures could reach the upper 80s and the 90s in the foothills.
For the latest forecast, go to www.modbee.com/weather.