Kate Adie introduces BBC correspondents' reports from Sudan, Spain, Tunisia, Italy and Mexico.

Sudan's newest civil war has been raging for more than three months - but first-hand images and reports of conflict are not easy to find. Barbara Plett Usher has been working to cover the violence from Nairobi, in Kenya, and reflects on what it's been possible to confirm.

In this weekend's snap general election in Spain, current Socialist PM Pedro Sanchez tests his mandate against growing pressure from the right - not just the traditional conservatives of the Partido Popular, but also a range of more firmly nationalist parties. Each major blocs has questioned the other's alliances - whether with smaller parties from the far right, or others from the Basque-nationalist movement. Guy Hedgecoe reports from Madrid.

Tunisia may have been the birthplace of the so-called Arab Spring, but these days its democratic credentials seem corroded. President Kais Saied is on an increasingly authoritarian tear, the economy's sputtering and the country's treatment of sub-Saharan African migrants has been growing ever harsher. And as Mike Thomson experienced on a recent trip, the media are still under VERY close supervision.

Much of Southern Europe is baking - if not burning - in a searing heatwave. Sofia Bettiza saw how people are adapting to the soaring temperatures on the streets of Palermo, in Sicily - and heard about concerns for Italians' health in this heat.

And from Mexico City, an unexpected casualty of gentrification. The BBC's Central America correspondent Will Grant has been trying to keep ahead of a wave of affluent foreigners - especially US citizens - moving in, but recently his young daughters' nursery has been priced out of the neighbourhood.