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Randal Bibb, 52, was injured in the explosions.

9:10 p.m.Parkland Hospital says Randal Bibb is in serious condtion and Daniel McMurry is in fair condition.
- WFAA-TV newsdesk

7:18 p.m. The Texas Department of Transportation is in the process ofopening up everything except the exits to Industrial Blvd on both I-30 and I-35E.
- TxDOT

6:21 p.m. Hyatt Regency Reunion says no windows were shattered by the blasts.
- WFAA-TV newsdesk

6:05 p.m. Dallas Fire-Rescue says it will be at least 7 p.m. and perhaps 8 p.m. Wednesday before reopening the evacuation zone to residents and business owners.
- Dan Ronan reporting from Dallas

5:12 p.m. Wednesday's episode of "All My Children," pre-empted because of Channel 8's coverage of the Dallas explosion, will be shown in its entirety at 3:10 a.m. Thursday on WFAA-TV.
- WFAA-TV Staff

5:10 p.m. Dallas Fire-Rescue spokesman Lt. Joel Lavender says it is still uncertain when businesses and residents inside the half-mile evacuation zone will be allowed to return to the area.
- Dan Ronan reporting from Dallas

5:06 p.m. The Texas Department of Transportation says highways in downtown Dallas shut down because of the explosion may be reopened by 6 p.m. Wednesday.
- Brad Hawkins reporting from Dallas

4:22 p.m. Due to this morning's explosion, the Dallas Emergency Operations Center estimates some downtown freeways and roads will remain closed until approximately 7 p.m. this evening while clean-up and investigation continues. The City of Dallas is working with the Texas Department of Transportation to determine when the area around the roadways is safe to open up for vehicular traffic.

Major Highway Closures:

I-35 Southbound at Woodall Rogers

I-35 Northbound at 8th Street

I-30 Eastbound at Loop 12/Walton Walker in Irving

Westbound I-30 at RL Thornton (forced to go South)

Westbound I-30 at Hampton

Road Closures:

Southbound Stemmons before Woodall Rogers

Westbound Woodall Rogers at Southbound I-35

Reunion Blvd at I-35

Eastbound I-30 at Sylvan

Continental at Stemmons

Industrial at Continental

3:48 p.m. Police say the scene of the explosion is no longer a crime scene. Bridges nearby are being check for structural damage. WFAA-TV newsroom

3:27 p.m. Three of the plants guard dogs -- two Dobermans and a pit bull -- are feared dead, Randall Lassiter, a supervisor at Southwest Industrial Gases, told reporter Steve Thompson. "I tried to get to them. ... We couldn't get them out," Mr. Lassiter said. "The guy that works midnights, he loves them dogs." Mr. Lassiter also said he lost his 1998 Dodge truck to the blaze. A friend told him the TV news showed it melted. Dallas Morning News

3:12 p.m. Major Highway Closures:

I-35 Southbound at Woodall Rogers

I-35 Northbound at Eighth Street

I-30 Eastbound at Loop 12/Walton Walker in Irving

Westbound I-30 at RL Thornton (forced to go South)

Westbound I-30 at Hampton

Road Closures:

Southbound Stemmons before Woodall Rogers

Westbound Woodall Rogers at Southbound I-35

Reunion Boulevard at I-35

Eastbound I-30 at Sylvan

Continental at Stemmons

Industrial at Continental

Dallas Morning News

2:18 p.m. Dallas Morning News reporter Michael Grabell says Parkland has identified two of the recovering victims as Randal Bibb, 52, and Daniel McMurry, 56, both of Dallas. Mr. McMurry is the plant's co-owner and manager. WFAA-TV newsroom

2:03 p.m. TxDOT have said Dallas PD has requested that they do not enter the posted perimeter that they have established in the area of the explosion. The Central Maintenance Supervisor has been instructed to not remove any debris from any roadway inside the perimeter, as it is considered a crime scene at this time. They removed some debris from the roadway several minutes ago and were instructed to place it back at the same location. WFAA-TV newsroom

2:01 p.m. The Salvation Army has two mobile disaster units on site at the scene of the explosion near downtown Dallas. Salvation Army volunteers will provide drinks and food to emergency workers and any others involved in the disaster. The mobile disaster unit is stationed at Reunion Blvd. at Industrial Blvd. WFAA-TV newsroom

12:52 p.m. This is a gas distribution facility. It brings gas from Houston - compresses that gas - then puts into smaller cylinders. Zoning laws allowed the company to store acetylene in tanks. The question is do we want these kinds of businesses near downtown? WFAA's Byron Harris

12:50 p.m. The owner and manager tried to put out the fire with a water hose. It seems to be just an accident and that no one is at fault. They've been in business for 30 years. They have been inspected each year with no problem. The truck driver was injured when he jumped out of his truck. He has a back injury. The shop owner and shop manager have burns to their upper body but they are not life-threatening. Lt. Joel Lavender of the Dallas Fire Rescue

12:30 p.m. Two men are in serious condition but we've been told they are expected to survive. The two men - in their late 30s - were brought in at 10:30 a.m. WFAA's David Schechter at Parkland Hospital

12:28 p.m. The Society for the Prevention of Cruelty to Animals closed one of its offices a few blocks away. Staffers and animals were moved to another side of the building and animals recovering from surgery were taken to another facility, the group said in statement. Dallas County's main jail and criminal courts building were at the edge of the evacuation zone but continued to operate, said Deputy Michael Ortiz of the Dallas County Sheriff's Department. Associated Press

12:27 p.m. We have heard from the EPA that the air in the area is safe. Macie Jepson, WFAA-TV

12:23 p.m. An investigative team from the U.S. Chemical Safety Board is deploying to the site of this morning's serious explosions and fire at the Southwest Industrial Gases gas cylinder distribution facility in Dallas. The team of five investigators, including Supervisory Investigator Robert Hall, P.E., and Investigations Manager Stephen Selk, P.E., is expected to arrive in Dallas later today. A CSB board member will be joining the team. CBS press release

WFAA-TV

People are fleeing the area.

12:10 p.m. Our mission was to set up a secure perimeter around this. We used officers from all six patrol divisions. The magnitude of trying shut down traffic and pedestrians was huge. We have 100 officers in posted positions. Eastbound I-30 at loop 12 is shutdown, northbound 35 at 30 is shutdown. Around 25 people cannot access their cars. We have not ruled out [terrorism]. We do have federal agents on site to help us with that evaluation. We were very concerned about our officers' respiratory issues. Police spokesman

11:58 a.m. We are trying first to put the fire out and then we will do a search. At this time, we don't think anybody is missing . We are still assessing the fire. When we feel we have the fire under control, then we will send our firefighters in. It's very dangerous. There are all types of medical gases, welding gases, hydrogen. Dallas Fire Rescue spokesman

11:58 a.m. The smoke has started to lighten up a bit. People know they have got most of the acetylene out but they are worried there may still be some in there. We know there was someone there at the beginning with a hose trying to put this out. We are talking about canisters that are the size of your bathtub. The debris here is wide. The question is what gas is still around? I think I've seen some canisters that have not yet exploded. WFAA's John McCaa

11:52 a.m. Now it smells like grass fire. WFAA's Chris Heinbaugh

11:45 a.m. Scorch marks can be seen from the storage area across four lanes of traffic. Canisters set the median grass on fire. I can see fire trucks waiting to be given the OK to go in. There appear to be a couple of liquor stores near here and a couple of gas stations. Other than that it is sparsely populated. WFAA's Troy Bush in HD Chopper 8.

11:45 a.m. We have heard that windows at the Hyatt were shattered by the explosion. DART is starting to resume a normal service. WFAA's Jeff Brady

11:41 a.m. We are hearing that seven people were on duty at the time of the explosion. We are seeing empty cars on the site. WFAA's Macie Jepson

11:38 a.m. I am counting three, if not four, ambulances on the scene. They are sending in firemen a few men at a time. They are keeping the majority of people a quarter of a mile from the scene. No one is allowed to go westbound I-30. It is still pretty much a secure area. WFAA's Jim Douglas

11:18 a.m. We have been looking at helium - we have found out that it is not toxic. But if you have dizziness, you should seek medical attention. WFAA's Janet St. James

11:17 a.m. Southwest Industrial Gases complex is the company that went up. Three people were injured - two of them badly. Acetylene, oxygen and potentially helium went up. WFAA's Byron Harris

11:08 a.m. We are beginning the process of monitoring the air. We don't have data yet. It will take two to three hours to have data that we feel is valid. Dave Bary, EPA

11:08 a.m. Witnesses are saying this is like watching a Die Hard movie. I am breathing just fine right now. If you are asthmatic you probably shouldn't be taking this in. People say they saw the fire shoot up 60 feet which is roughly the height of the Reunion Tower. We don't advise people to take a look, as smoke can irritate the lungs. WFAA's Debbie Denmon

11:05 a.m. We have just heard another blast. Grass is on fire. Something does continue to burn down there. Firefighters seem to be using good wisdom by standing back. No lives appear to be threatened at the moment. Whatever is back there is still continuing to burn. We have seen some firefighters with gas masks. It looked like it was snowing when we got here initially. A SWAT sqad is on the scene. WFAA's Chris Heinbaugh

10:57 a.m. A pulmonarologist has said that acetylene is not toxic. People exposed to the soot may have some breathing difficulties they may need to get checked. We know acetylene tanks exploded and oxygen tanks were in the area. There have been tanks that have not been identified. If they contain other gases that could shed a whole different light on the situation. WFAA's Janet St. James

10:55 a.m. From what I've seen - Dallas PD and firefighters did the right thing by evacuating the area. Dallas Fire Department spokesperson

10:46 a.m. There are people who speculate out loud that terrorism may be involved. Washington officials say there is no connection to terror activities. No updates to the DART information. Bus services still being rerouted. 45 moving pretty well. Woodall Rodgers Freeway is moving pretty well. Grid is not locked but is full. There is not an open lane in downtown Dallas. WFAA's Brad Hawkins

10:40 a.m. DART has suspended service between 8th and Corinth station and Union Station. The TRE is still running but buses covering routes in the area have been diverted. WFAA's Brad Hawkins

10:30 a.m. Hospitals monitor the air. Children's Medical Hospital located around 10 miles from the scene have not recorded any toxins. The two patients at Parkland Hospital are listed in serious conditions. WFAA's Janet St. James

10 a.m. "I was going south on I-35. The first thing I saw was a huge fire ball," said witness Kathy Willaims. "I saw flames as high as the train overpass. It seemed as if the flames were as high as Reunion Tower."

9:30 a.m. Our correspondent Chris Heinbaugh was hit on the head by a projectile. "Pebble-sized ash is falling all around," he said. Debris can be seen more than 200 yards from the site of the blast. The Humane Society was hit by debris. Police and firefighters are arriving on the scene but they cannot get near the site of the explosions. Cars and trucks are on fire. There have been reports of broken windows and grass in the area is on fire.

Around 9 a.m. Multiple explosions took place near downtown Dallas at 500 Industrial and I-35. People could be seen fleeing the area and roads have been closed. Traffic is building up along roads leading to the site. Traffic is very slow in downtown Dallas. Parkland Hospital has received two people injured by the blast. A tank containing acetylene is thought to have exploded. Acetylene is used for welding due to the high temperature of the flame - combustion of acetylene with oxygen produces a flame of over 6,000 F. The explosions are massive - this is a dangerous situation. Fire can be seen shooting into the air and there is billowing black smoke. This has flared up, then calmed down, only to flare up again.