RF signal strength.?

I live in South Phoenix, just next to the mountain that carries TV & cell phone towers. I'm a little in the shadow of the mountai. But normally have a strong signal.

Every year when the monsoon storms come in, I lose cell phone service. I normally figure maybe there's a problem with the cell phone tower in the high winds. But this year, I lost my WiFi, despite being only 20-30 feet away from my router & normally having a strong signal.

Is it possible that atmospheric conditions, associated with the storms (and static charge from all the dust that the storms carry), are causing both problems ?

If not, WTF is going on. I blamed my (COX cable) ISP. They've been out to me every year for the last 8 years, and they've replaced many coaxial connections, to fix drawback in the solid core. I think they've also fitted a kind of modulator on the coaxial, going in to the router. The signal to the router looked strong this year.