The Sacramento region will get a good dose of sunshine and increasing heat this week, with high temperatures expected to reach into triple-digit territory, forecasters say.

On Sunday, the high temperatures will reach about 92 degrees, but a sharp rise in heat is expected beginning Tuesday.

“The big story for this week will be the warm-up,” said David Rowe, a forecaster with the National Weather Service in Sacramento.

Cause of the heat wave is a strong ridge of high pressure making its way through Northern California, Rowe said.

Here’s the seven-day forecast:

Sunday: Sunny, with a high near 92. South-southwest wind around 8 mph.

Sunday night: Clear, with a low around 61. South-southwest wind 5 to 11 mph.

Monday: Sunny and hot, with a high near 98. Light and variable wind becoming north-northwest 5 to 10 mph in the morning.

Monday night: Clear, with a low around 65. Northwest-wind 5 to 9 mph becoming light in the evening.

Tuesday: Sunny and hot, with a high near 103. North-northwest wind 3 to 6 mph.

Tuesday night: Clear, with a low around 66.

Wednesday: Sunny and hot, with a high near 106.

Wednesday night: Mostly clear, with a low around 68.

Thursday: Mostly sunny and hot, with a high near 102.

Thursday night: Partly cloudy, with a low around 66.

Friday: Mostly sunny and hot, with a high near 98.

Friday night: Partly cloudy, with a low around 67.

Saturday: Mostly sunny and hot, with a high near 98.