All evacuation orders lifted, no threat of explosion, fire or leak at Garden Grove chemical tank

Firefighters are putting their lives on the line to perform a high-risk operation at a compromised chemical tank in Garden Grove.

Firefighters are putting their lives on the line to perform a high-risk operation at a compromised chemical tank in Garden Grove, trying to figure out whether the risk of an explosion is still there.

The Orange County Fire Authority says the firefighters will be working all night to assess the status of the tanks at GKN Aerospace.

The internal temperature of the tank is now at or exceeding 100 degrees, making for a very volatile situation. Now, crews are working to confirm if the pressure in the tank has been released and if the threat of explosion is eliminated.

Firefighters discovered a crack in the tank on Saturday night, saying that could be alleviating some of the pressure that has been building up inside.

OCFA says there is jsut one known crack on the tank and no active chemical leak.

OCFA Captain Brian Yau says firefighters will continue assessing the tanks on high ladders, but it's high-risk

"We know that it's over 100 degrees inside. We don't know what the temperature is, so being near that tank is high risk in itself, because it still has the possibility to have a catastrophic failure," Yao said.

Crews will be surveying to see if there are any additional cracks. AIR7 captured video of peeling weather stripping on the exterior of the tank

It was revealed earlier Saturday that once the internal tank temperature reaches 100 degrees, experts aren't able to determine how far over 100 the tank is. It now comes down to figuring out a plan.

"Determine what's happening, what's happening on the inside, and with that intelligence, that knowledge, and that assessment, we can take that information back to the experts and form a new plan and a new risk analysis," Yao said.

Local leaders are calling on President Donald Trump to approve a federal emergency declaration.

Gov. Gavin Newsom submitted an official request on Saturday night after already proclaiming a state of emergency.

An emergency declaration would allow FEMA to provide resources and funds to help with services like evacuations and shelters, as 50,000 residents remain evacuated.

The Orange County Fire Authority is clarifying that there is only one known crack in a chemical tank at the center of an emergency response in Garden Grove.

In a post on social media, the OCFA said there is one known crack in the tank, plus peeling of the weather stripping on the exterior.

Earlier Sunday, a public information officer with OCFA told Eyewitness News there were multiple cracks.

Authorities also noted that ongoing atmospheric monitoring confirms there are no chemicals leaking from the tank.

An all-night mission will be conducted by crews with the Orange County Fire Authority to confirm if the risk of catastrophic explosion has been eliminated at GKN Aerospace, according to Interim Fire Chief TJ McGovern.

In an update on social media, McGovern said crews will be working all night to check if the pressure in the tank has been released and that the BLEVE threat has been eliminated.

"The BLEVE threat is the worst-case catastrophic event that we have been talking about. We are not there yet. We need to run this operation tonight," McGovern said.

BLEVE stands for Boiling Liquid Expanding Vapor Explosion.

McGovern said residents are being asked to continue to stay out of the evacuation zone. He said authorities will provide an update on the operation on Monday.

Disneyland Resort says it is monitoring an ongoing chemical incident at an industrial facility in Garden Grove, but as of Sunday, there are no impacts to theme park operations.

Disneyland is approximately five miles from GKN Aerospace, where an unstable tank carrying a toxic chemical is at risk of exploding or spilling.

An evacuation zone approximately nine square miles in size has forced the displacement of tens of thousands of Orange County residents.

Despite this, Disneyland Resort is not within the evacuation zone.

"While the situation remains fluid and we may see road closures and minor traffic disruptions, there is no direct impact on park operations at this time," Disneyland wrote in an update to guests.

In an update on Sunday, the Orange County Fire Authority stressed that any areas outside of the established evacuation zone are "considered completely safe and day-to-day activities can continue as normal."