The Cowboys have decided to move their Wednesday practice to Cowboys Stadium, with thunderstorms in the forecast.
During one of the hottest summers on record for North Texas, the team has spent most of its practices indoors. They worked out in San Antonio's Alamodome for two weeks before moving to Cowboys Stadium, and have generally dodged the elements since shifting to Valley Ranch midway through the preseason.
After Wednesday, temperatures cool off in North Texas for the remainder of the week, though rain is still projected on Thursday and Friday.
The forecast for Sunday's game in San Francisco is sunny, with a high in the upper 60s.