Last night, K-indices rose to around 6, or a G2 Geomagnetic Storm. The MW band was dead most of the time - except an hour or so between 01:00 and 02:00 UTC. The Jaguar spectrum below illustrates very well how the band woke up from nothingness to many stations on each frequency for a short period.
So, even during solar storms, you should check your radio! Unfortunately, on 1570, the usual dominant CJVL wouldn't give way to other stations.