Here I was thinking that full hazmat bodysuits with facial filter mask are only worn in hazardous biological or nuclear environments... But deducing the information from the mainstream media that “gas cylinder” must have had some dangerously high radioactive levels for the guy in first picture to have to don full protective gear and a Geiger counter....
If I'm not mistaken the guys at the scene are wearing hazard suits similar to those sold on here [Link], the recommended usage for these overalls from the manufacturer is as follows:
"Tychem® SL is ideal for chemical mixing, remediation, emerency medical response, paint spraying, and radioactive environments....
Warning: Tyvek® should not be used around heat, sparks or in potentially flammable or explosive environments."
I guess that rules out wearing those suit where there was gas explosion ...
?? Not sure if this has been mentioned before or the accuracy but there were some earlier reports mentioning that some of vehicles nearby stopped working... [Link]
More pictures from the scene here [Link]