Italy death rate (per 1000 people annually) – 10.7 [source]
Lombardia population – 10 mln [source]
If we assume that annual deaths rate in Lombardia is the same – 10.7 per 1000, then:
10.7*10000=107000 people die in Lombardia annually, or 107000/365=293 deaths daily. Lets round up it to 300.
Most people in Italy die because of ischemic heart diseases, stroke and cancer. Lower respiratory diseases is a cause of only 3% of all deaths [source]
3% of 300 = 9 deaths because of lower respiratory diseases daily.
Thus, before the COVID-19 pandemic 300 people were dying in Lombardia daily, 9 of them – because of lower respiratory diseases.
Yesterday (March 21, 2020) 546 people died in Lombardia because of COVID-19 [source]