Central Texas has thawed out today under a sunny sky after a severe winter weather system brought snow, sleet, and graupel to the region Monday night. But don't

"It's called 'black ice' because it tends to look like the rest of the pavement on the road, although in reality, it's actually clear," the US Forest Service notes. "Black ice forms without creating bubbles, which allows it to blend in with any surface it forms over. Black ice is dangerous precisely because it's hard to detect."

Storm chaser Aaron Jayjack reports roads and highways covered in snow and ice in the aftermath of the historic winter storm in Houston, Texas, on Jan. 22. But warmer weather is coming to thaw the ice.

With freezing temperatures holding firm, much of Houston remains at a standstill, as schools, businesses and many roads remained closed Wednesday morning. State of play: Driving on roads is still not advised as melted snow has refrozen.