There can be little doubt about the seriousness of wildfires that have roared across Christchurch's Port HIlls since Monday, destroying 11 homes and scorching more than 2000ha.
But if there's any doubt, this timelapse video shot by freelance photographer Dru Norriss on Wednesday will clear it.
The 1m 38s video is a snapshot of the fire's power, showing its increasing ferocity as it moves towards Norriss' vantage point at the end of Bengal Drive in the suburb of Cashmere.
Norriss, a musician and wedding photographer, lives nearby and decided on a whim to make a timelapse video.
"It's not something I've done a lot of and the fact that people have found it striking is quite humbling."
The sequence was shot over an hour and 22 minutes, starting just before 1pm and finishing just after 2pm. It was developed from 2456 exposures.
A second timelapse video of the fire, taken after sundown and into the night, and which he believes is even more striking, is also now online.
But it was also tinged with the realisation he was filming others' loss.
"I've got friends [whose] parents have lost their house up there and I imagine in the second video I've done it's in there somewhere."
However, the footage would also ensure people - especially those outside Christchurch - understood the magnitude of the disaster.
"It's really humbling to know that I will help people make a bit more sense of it."