Over heat Could be the reason OVH Data Center Fire

What is the reason for 2021 OVH Data Center Fire?

Reason OVH Data Center Fire: Big fire at an OVH Data Center in France Europe takes down thousands of big popular sites.A fire early Wednesday 2021 Tuesday night to morning destroyed 2 of OVH’s Strasbourg data servers and part of a another one, the French cloud provider’s CEO said SBG1, SBG3, SBG4 are destroyed.

Big WordPress cache plugin Wp rocket use these data center went down too but according to wp rockt they mention their plugin still on work.