Sponsor Shade Hire Services
At beaches in England & Europe you can hire deck chairs and umbrellas. I think the government should sponsor local community groups to hire shade tents and umbrellas at beaches, parks, and popular places where there is no shade. If the government paid for equipment and either volunteer community groups or unemployed people worked the hire service, I think it would catch on very quickly. Many people don't own, or don't have room in vehicles for these.