This year's early bout of heat is likely to blame for the early sightings. The National Weather Service has issued warnings for much of Southeast Texas this week, where an unseasonably intense heat wave is developing. Cities like Houston are expected to hit the mid to upper 90s this week, possibly breaking temperature records for May.

Heat advisories and extreme heat warnings are in effect west of Houston this week as an unusually early heat wave takes hold. What do these heat alerts mean?

In Texas, a large area of the state is expected to experience temperatures up 15 to 25 degrees above normal — into the 90s and 100s in all but a few locations.

Some claim that keeping your garage door cracked keeps your home cooler. Here's what experts say about the popular tip and how to stay cool this year.

The Texas power grid is expected to sail through the first major heat wave of the year without issue, largely thanks to its diverse and growing mix of power plants and renewable energy. That's an observation energy professionals closely following the Texas Legislature made with some irony,

A heat wave moving across Texas is expected to peak tomorrow with a high of 101 degrees for Dallas-Fort Worth.

Texas Agricultural Commissioner Sid Miller said the heat may break records this week, but farmers are prepared for the weather.

Forecasters in Austin and Dallas say those areas may be in for historic high temperatures with the mercury climbing over 100. Houston should see warmth, too.