The tragedy has unleashed a wave of local solidarity. Residents in communities like Paiporta — where at least 62 people died — and Catarroja have been walking kilometers (miles) in sticky mud to Valencia to get supplies, passing neighbors from unaffected areas who are bringing carry water, essential products, shovels or brooms to help remove the mud. The large number of people coming to help has led the authorities to ask them not to drive there, because they block the roads needed by…