Where did the fevers go?

This website tracks real time fevers using thermometers connected to the internet.  A first glance at their map suggests to me that:

• fevers spiked two week ago.
• The timing of the spike is similar across the country,
• but magnitude greater in those regions with more COVID-19 deaths.
• The time difference in the peak across counties is at most a few days.

Does this mean that the rest of the country is not significantly lagging NYC?  Or that COVID-19 fevers are a small fraction of all fevers?