One way water can enter your basement or crawl space is through leaking windows. Especially if you have ground-level windows in your basement, outdoor flooding can cause significant hydrostatic pressure, sometimes leading to leaks.
One option is to just caulk the window seals. Although this can help, it’s only a temporary solution. If the home’s directing water toward the windows, or you live in an area with significant flooding from rain, it’s not going to fix the problem.
A professional can help you install special egress basement windows and window wells, which can more effectively withstand the rain. You may also need to ask a JES expert to look at the grading around your home to make sure the water’s directed away from your basement windows and not toward it.