The font size is too small for emergencies on mobile devices. You need to consider that users might be in a panic, may not have both hands free to zoom in, and their vision could be impaired by smoke or other factors.
It is astonishing how one's motor skills degrade when the adrenaline is flowing. I once tried to dial 911 on an iPhone in such circumstances. My hands were shaking so badly I kept dialing 922, 811, 914, and so on. Terrible in the moment but a very good lesson for preparedness. I really appreciate the "dial Emergency" methods on modern phone software that just need a button held down.
Thank you. This has been patched.