That coal plant is only ~10km away from the highest concentration of SO2 levels: The area between Houhu Lake, Lijiadun Residential District and Shekou Residential District.
There are countless studies that show that high levels of SO2 can cause susceptibility to viral and bacterial infections. Maybe this is the reason the deaths are so high in Wuhan compared to other effected cities.
I wish some Chinese official could see this and investigate the connection.