A situation has arisen.
A super-wizard class hacker has been located and targeted with a Tomahawk missile. Unfortunately our hacker doesn't have time to locate the origin of the missile and neutralise it and there is no local anti-missile defense system he can hijack.
However - a nearby solar power array on the roof he's on (take it as read that roofs are where main characters hang out in this continuity) gives him an idea. He hijacks every heliostat within (a required distance) and instructs them to target the missile which politely explodes at a safe distance and infuriates the antagonist.
Question: Is this feasible or are there more efficient ways to quickly use a city's resources to destroy an incoming missile?
Notes: Please assume that the type of heliostats is the non-concentrating type - they're flat mirrors and that the heliostats receive the average amount of sunlight per square meter on Earth.