sensing

Amen.

Quoted: Common sense dictates that you have a plan for freakish emergencies, even those that happen only once every decade.
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In this case, three things:
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1. Use salt to melt ice when it risks crippling the city for days
2. Close off streets that are impassable with police and official sign barricades
3. Hire private contractors to help with the plowing efforts
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These measures will not cost hundreds of millions. They should not impact the environment to any significant degree if only used every decade or so.