7:25 a.m. U.S. Coast Guard is conducting urban search and rescue in the Greater Houston area. Residents are urged not to call for rescue if they are not in a life-threatening situation. Rescue teams are prioritizing rescues by urgency. If you are in need of rescue, call 911 or the U.S. Coast Guard Houston Command Center at 281-464-4851  

"CATASTROPHIC FLOODING IN THE HOUSTON METROPOLITAN AREA IS EXPECTED TO WORSEN AND COULD BECOME HISTORIC" https://t.co/Hw20B0Uz1z #houwx

— NWS Houston (@NWSHouston) August 27, 2017

I can keep telling you to stay put, but the reality is YOU CAN'T GET ANYWHERE RIGHT NOW. pic.twitter.com/jcif3OnnIa

— Francisco Sanchez (@DisasterPIO) August 27, 2017

 

Please everyone be careful there is rushing water over the roadways. This is video taken by U of H downtown #HurricaneHarvey pic.twitter.com/LiGQvk0W7Z

— HPOU (@HPOUTX) August 27, 2017

EMERGENCY MANAGEMENT HAS REQUESTED: IF HIGHEST FLOOR OF YOUR HOME BECOMES DANGEROUS...GET ON THE ROOF. #houwx #glswx #txwx #Harvey pic.twitter.com/rG3dsdQUxu

— NWS Houston (@NWSHouston) August 27, 2017

6:20 a.m. Houston Police Chief Art Acevedo calls this a 500 year event. All bayous are over banks. More than 1,000 rescues so far.  

HCTRA Tolls waived - due to catastrophic flooding in region - tolls on Harris County toll roads waived until further notice. 3:04 AM

— HCTRA (@HCTRA) August 27, 2017

CANNOT STRESS THIS ENOUGH. DO NOT ATTEMPT TO TRAVEL. This is a PARTICULARLY DANGEROUS & LIFE THREATENING SITUATION. STAY PUT! #houwx #glswx

— NWS Houston (@NWSHouston) August 27, 2017

Safety is our highest priority. We'll let you know when we are able to resume service. #houwx #Harvey ^B pic.twitter.com/Rj0bXgbcC3

— METRO Houston (@METROHouston) August 27, 2017

From ABC13