No sir:
"FEMA may provide accelerated Federal assistance and support where necessary to save lives, prevent human suffering, or mitigate severe damage, even in the absence of a specific request."
...the PDF will not link, if you paste the above quote into Google the 16 page PDF will be at the top of your search
Name of PDF:
List of Authorities and References - FEMA
Link that refuses to work once I cut and paste it:
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Page 3. It even addresses the fact that waiting to be called should not slow response.
Given what I have seen of the water contamination potential this definitely qualifies.