The temperatures are likely too high and that is a big part of the problem. You said you couldn't control the temperature so I'm at a loss of what to tell you to do. You can just use the light intermittently but that will only be a short term solution because they will need the UVB. I keep mine indoors in AC. Maybe a bin outdoors in mostly shade would work. I know others use that method.
I also don't know what to do about your food problem without pinhead crickets or fruit fly sized feeders they are unlikely to eat.
I hope they rally but I don't know how to help. You should know that she will very likely have another litter in 3-4 months.