notadictionary.com
Il va faire plus chaud à Perpignan qu'à Marrakech
→ “It's going to be hotter in Perpignan than in Marrakech”
Il va [yào] — Is going to — future tense auxiliary verb. Think of it as 'about to' or 'going to'.
faire [zuò] — To make/do — here it's part of the expression 'faire + adjective', meaning 'to be + adjective'. So 'faire chaud' = 'to be hot'.
plus [gèng] — More — used to compare degrees, like 'hotter' or 'more...'.
chaud [rè] — Hot — the adjective describing the temperature.
à [zài] — At/in — preposition indicating location. 'À Perpignan' = 'in Perpignan'.
Perpignan — A city in southern France — no translation needed, it's a proper noun.
qu' [bǐ] — Than — conjunction used for comparison. 'Qu'à' is a contraction of 'que à'.
à [zài] — At/in — again, preposition for location.
Marrakech — A city in Morocco — another proper noun, no translation needed.
notadictionary.com
l'alerte canicule déclenchée dans les Pyrénées-Orientales
→ “the heatwave alert triggered in the Eastern Pyrenees”
l'alerte canicule [rènǎo] — Heatwave — a very intense heat spell.
déclenchée [fāqǐ] — Triggered — past participle of 'déclencher' (to trigger).
dans [zài] — In — preposition indicating location.
les Pyrénées-Orientales — Eastern Pyrenees — a region in southern France, bordering Spain.