Can we draw the following hypothesis from the context? 

Context:

Typhoon Xangsane was downgraded to a tropical storm Sunday as it moved inland from the central Vietnam coast, where it killed two people, injured at least 80 others and damaged hundreds of homes, officials and state-controlled media reported.

Hypothesis: JTWC has made the announcement that Typhoon Xangsane has been downgraded to a tropical storm.
It's impossible to say