Temperatures in Houston are expected to reach the upper 90s on Tuesday and Wednesday, with a heat index ranging from 104°-106° in the afternoon. There is a 20% chance of an isolated shower on these days. A change in the weather pattern is anticipated on Thursday, with the development of an area of high pressure to the east.

This will bring a flow of air from the Gulf, leading to increased humidity and cloud cover. Further details about the upcoming weather pattern change are available from the source. It is noted that while temperatures may be slightly lower, the heat index will remain unchanged due to higher humidity.