The areas of, in, and around the medical centers of the Gaza Strip, have been jammed with people - LIVE:
https://www.youtube.com/watch?v=LAuk-44p-WI
Apologies; turns out that about 1/4 of the people in that video of the Gaza Al Shifa (Hospital) outside area, are journalists.
Also, HAMAS et al are probably over-stating the casualties.
But, from what I have read, the “warhead” of some of the HAMAS rockets, is quite powerful.