An Official Rescue is a mission in LEGO City Undercover: The Chase Begins.
Walkthrough[]
Start scaling the building in typical fashion, putting out the fires as you go. A launchpad at the base of the steps provides an easy means to getting higher up on the building. Shimmy along the side of the building and keep putting out the fires.
As you continue, you will use a teleporter, and then come across a ladder imbued with electricity that you have to cut the power off to by messing with a nearby box as a Construction Worker. Getting higher up on the roof results in enemies literally coming out of the woodwork, so smash them down before they become too much of a headache.
Continue putting out the fires and beating up the bad guys. There will be a Simon Says box that you will have to mess with using your Astronaut costume, so do that when you get the chance. Throw together the parts that come from that to create your own personal water turret. Use it to put out the fires that are surrounding the mayor.[1]