President Barack Obama returns to California this week to attend Democratic fundraisers and make an appearance on "The Ellen DeGeneres Show." (See a map of the areas that will likely be affected here.)

Obama will make his first stop in San Jose, where he's scheduled to arrive on Wednesday and stay overnight.

The White House says he will attend political fundraisers in the heart of Silicon Valley Thursday before flying to Los Angeles, where he'll also attend Democratic fundraisers and tape an interview with Ellen DeGeneres.

People should give themselves an extra 20 to 30 minutes to get to their destinations, the L.A. Police Department's Tony Im told KPCC. He also offered some other advice.

"We're going to have a lot of onlookers wanting to get a glimpse of the president, so they might not be paying attention to the road, so please be careful you're not driving too close to the person in front of you and potentially get into a car accident," Im said.

The LAPD released this list of areas that could experience traffic delays due to Obama's visit:

Thursday, Feb. 11

3:15 p.m. – 4:45 p.m.: The area around N. Hollywood Way between N. San Fernando Boulevard & Forest Lawn Drive

The area around N. Hollywood Way between N. San Fernando Boulevard & Forest Lawn Drive 4:45 p.m. – 6:15 p.m: The area around N. Hollywood Way between Forest Lawn Drive & N. San Fernando Boulevard

The area around N. Hollywood Way between Forest Lawn Drive & N. San Fernando Boulevard 5:30 p.m. - 7 p.m: The area around Rimpau Boulevard between W. Pico Boulevard & W. 6th Street

The area around Rimpau Boulevard between W. Pico Boulevard & W. 6th Street 5:30 p.m. – 7 p.m: The area around Wilshire Boulevard between S. Hudson Avenue & S. Arden Boulevard

The area around Wilshire Boulevard between S. Hudson Avenue & S. Arden Boulevard 7:15 p.m. – 8:45 p.m: The area around W. 4th Street between S. Muirfield Road & Lorraine Boulevard

The area around W. 4th Street between S. Muirfield Road & Lorraine Boulevard 8:45 p.m. – 10:30 p.m: The area around Crenshaw Boulevard between Wilshire Boulevard & West Adams Boulevard

The area around Crenshaw Boulevard between Wilshire Boulevard & West Adams Boulevard 8:45 p.m. – 10:30 p.m: The area around Wilshire Boulevard between the 405 Freeway & Malcolm Ave (Expect heavy traffic in the Westwood Village area)

Friday, Feb. 12

9:30 a.m. – 11 a.m: The area around Wilshire Boulevard between the Westwood Village area and the 405 Freeway

The area around Wilshire Boulevard between the Westwood Village area and the 405 Freeway 9:30 a.m. – 11 a.m.: The area around S. Bundy Drive between Ocean Park Boulevard & the 10 Freeway

The LAPD also released this list of areas where there will be closures or other restrictions (though they noted that bus routes will not be impacted by the hard closures):

LAX Airport: NB and SB lanes of Sepulveda Blvd between Lincoln Blvd and Century Blvd will be closed to vehicular traffic for an eight minute period between the approximate hours of 2:30 p.m. to 4 p.m. on Feb. 11 and 9 a.m. to 10:30 a.m. on Feb. 12

NB and SB lanes of Sepulveda Blvd between Lincoln Blvd and Century Blvd will be closed to vehicular traffic for an eight minute period between Los Angeles High School: School will close at 3 p.m. South Rimpau Boulevard will be closed between Edgewood Place and West Olympic Boulevard from approximately 3 p.m. to 4 p.m. on Feb. 11

School will close South Rimpau Boulevard will be closed between Edgewood Place and West Olympic Boulevard 4000 Warner Boulevard, Burbank: Olive Avenue will be closed between North Pass Avenue and Hollywood Way from approximately 4 p.m. to 5:30 p.m. on Feb. 11

Olive Avenue will be closed between North Pass Avenue and Hollywood Way South Rossmore Avenue, Hancock Park: South Rossmore Avenue will be closed between West 3rd Street and Wilshire Boulevard from approximately 5 p.m. to 8 p.m. on Feb. 11

South Rossmore Avenue will be closed between West 3rd Street and Wilshire Boulevard West 6th Street will be closed between South Muirfield Road and South Arden Boulevard from approximately 5 p.m. to 8 p.m. on Feb. 11

will be closed between South Muirfield Road and South Arden Boulevard South Windsor Boulevard, Hancock Park: South Windsor Boulevard will be closed between West 2nd Street and West 5th Street from approximately 7:30 p.m. to 10 p.m. on Feb. 11

South Windsor Boulevard will be closed between West 2nd Street and West 5th Street West 3rd Street will be closed between South Plymouth Boulevard and Lorraine Boulevard from approximately 7:30 p.m. to 10 p.m. on Feb. 11

will be closed between South Plymouth Boulevard and Lorraine Boulevard Hilgard Avenue, Los Angeles: Hilgard Avenue will be closed between Weyburn Avenue and Le Conte Avenue from approximately 10 p.m., Feb. 11, through 10 a.m., Feb. 12

The LAPD noted that the traffic information had been released with the approval of the Secret Service.

See a map of the areas that will likely be affected:

Obama's appearance on "The Ellen DeGeneres Show" will air Friday, when he's scheduled to leave the state.

Obama has visited California some two dozen times during his presidency. He was last in Southern California in December, when he visited relatives of the 14 people killed in a shooting in San Bernardino.

This story has been updated.