ST. LOUIS (AP) _ Hot and sticky weather is wreaking havoc on the Super Bowl champions.

The St. Louis Rams plan to practice in the air-conditioned Trans World Dome on Wednesday and Thursday as a heat advisory remained in effect in St. Louis. A sign outside the dome read 101 degrees at noon Tuesday, and no relief was in sight.

``It was really hot out here yesterday,'' Rams spokesman Rick Smith said Tuesday. ``If we go to the indoor facility (at the team's practice facility in suburban St. Louis), it would probably even be worse.''

The Rams are preparing for their first Monday night appearance in a decade, a high-profile opener against the Denver Broncos. Coach Mike Martz has been holding two-hour practices, starting about 1:40 p.m. when temperatures are peaking, on the outdoor fields at Rams Park.

``If we got to the dome, we can get a couple of good days of work in,'' Smith said.

Also Tuesday, the Rams signed linebacker Chad Kelsay to the active roster. They released linebacker Jamel Smith.