The college football season is heating up.

What should we watch this week?

The Heat Index takes a look at several intriguing matchups in Week 3 of the season, including a showdown between Clemson and Louisville.

RELATED: College football schedule/scoreboard

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RELATED: See the Arizonans on college football rosters (not Pac-12)

Thursday, Sept. 14

New Mexico at Boise State, 5 p.m., ESPN: How will Boise State respond after its 47-44 loss to Washington State?

Friday, Sept. 15

Arizona at UTEP, 7:15 p.m., ESPN: Interesting tidbit about this trip is that Arizona will bus to El Paso on Thursday morning, then fly home after the game. The Wildcats are a 20-point favorite on the road.

MORE: Arizonans on UA’s roster

Saturday, Sept. 16

Air Force at Michigan, 9 a.m., Big Ten Network: Michigan has impressed early in the season and looks to keep building momentum.

Oklahoma State at Pittsburgh, 9 a.m., ESPN: Yes, it’s early, but Oklahoma State’s fans have big dreams for this season.

UCLA at Memphis, 9 a.m., Channel 15 (ABC): UCLA looks like it will have a big say in the Pac-12 race.

MORE: 15 Pac-12 games to watch in 2017

Notre Dame at Boston College, 12:30 p.m., ESPN:  Notre Dame lost to Georgia by a point last week. It can’t afford to fall to 1-2.

Tennessee at Florida, 12:30 p.m., Channel 5 (CBS): Florida is 0-1 on the season after its game vs. Northern Colorado was canceled last week.

Wisconsin at BYU, 12:30 p.m., Channel 15 (ABC): BYU is not off to the start it probably envisioned. It won’t be easy to turn things around vs. Badgers.

Army at Ohio State, 1:30 p.m., Channel 10 (FOX): Was Ohio State exposed in loss to Oklahoma? The Buckeyes have plenty of time to right the ship.

Oregon State at Washington State, 2:30 p.m., Pac-12 Networks: Does Washington State have a QB controversy? Evidently not. Does it even matter in that system?

MORE: Pac-12 football championship odds

Colorado State at Alabama, 4 p.m., ESPN2: Alabama continues to look really good. Their defense has really impressed so far.

LSU at Mississippi State, 4 p.m., ESPN: This SEC clash could provide a few fireworks. 

Oregon at Wyoming, 4 p.m., CBS Sports Network: Are the Ducks flying high again? It sure looks that way early on.

Arizona State at Texas Tech, 5 p.m., FSAZ Plus: The fans in Tempe are not happy and Todd Graham’s seat appears to be getting hotter. What would a loss here do?

MORE: Arizonans on ASU’s football roster

Clemson at Louisville, 5 p.m., Channel 15 (ABC): Game of the week? These two teams would both receive a huge boost to their national title hopes with a victory.

Texas at USC, 5:30 p.m., Channel 10 (FOX): USC appears ready to have a say in the national title picture. The Trojans have announced their first sellout since 2013 for this game.

Fresno State at Washington, 6:30 p.m., Pac-12 Networks: Fresno State lost to Alabama last week. The going probably won’t get any easier against the Huskies.

San Jose State at Utah, 7 p.m., ESPN2: Utah got to celebrate a big win over BYU last week. They shouldn’t have a problem with San Jose State, right?

Ole Miss at California, 7:30 p.m., ESPN: Cal is 2-0 and a win over 2-0 Ole Miss would really be big for the program and the Pac-12.

Stanford at San Diego State, 7:30 p.m., CBS Sports Network: San Diego State isn’t afraid of the Pac-12 (see last week’s win vs. ASU). Can it take another game from the conference?

RELATED: Ranking college football teams by Arizona high school players

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